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Which of these factors contribute to the nature and rate of soil formation? (choose all that apply)

- Amount of time available - Climate - Slope of the surface - Type of parent material

Which of the following factors would cause the cut-off grade of a mineral resource to rise? (Choose all that apply.)

- Better (more equitable) labor agreements - Rising energy costs - More stringent environmental regulations

Which of these are common silicate minerals? Select all that apply.

- Biotite - Olivine - Potassium feldspar - Quartz

Match the description of igneous rock texture to the correct term.

- Coarsely crystalline, individual crystals are readily visible to the unaided eye = phaneritic - Finely crystalline, individual crystals are too small to see with the unaided eye = aphanitic - A mix of coarse crystals surrounded by a matrix of finely crystalline material = porphyritic - Very large crystals (centimeters or larger) = pegmatitic

If the price of a mineral resource increases, which of these may occur? (choose all that apply)

- Consumer demand for the mineral resource may decrease - Mining may increase to increase the mineral supply - Consumers or product makers may seek a substitute mineral or product

Which of these changes in the physical conditions could cause a solid rock to melt? (Select all that apply.)

- Decrease in pressure - Increase in temperature - Addition of water

Which of these features would you expect to find at a convergent boundary where subduction is taking place? (select all that apply)

- Deep ocean trench - Shallow earthquakes - Volcanoes - Deep earthquakes

Match the plate boundary type below with the correct type of stress

- Divergent = tensional - Convergent = compressional - Transform = shear

Identify the processes below as mechanical (physical) or chemical weathering.

- Exfoliation = mechanical weathering - Frost wedging = mechanical weathering - Root wedging = mechanical weathering - Salt expansion = mechanical weathering - Hydrolysis = chemical weathering - Dissolution =chemical weathering - Oxidation = chemical weathering

What forces are involved in a mass sliding down an inclined plane? SELECT THREE

- Friction - Normal - Shear

Which of these are advantages to using solar energy to generate electricity

- Fuel source is free - It has very low emissions of carbon dioxide and air pollutant -Renewable energy source

Which of these changes to the crust would act to increase regional elevations? (select all that apply)

- Heat the crust - Decrease the density of the crust - Increase the thickness of the crust

What are the two primary sources of water for the City of Fort Collins?

- Horsetooth reservoir - Cache la Poudre river

Which of these characteristics of a drainage basin would tend to promote a shorter lag time between a rainfall event and peak discharge? (choose all that apply)

- Impermeable surfaces - Steeper terrain

Which of these changes to the crust would act to reduce regional elevations? (select all that apply)

- Increase density of crust - Cool the crust - Decrease the thickness of the crust

Which of these rock could be the parent rock of gneiss? (select all that apply)

- Mudrock (such as shale) - Granite

Which of these elements are considered Critical Materials in the Medium Term (2015-2025) by the U.S. Department of Energy? (select all that apply)

- Neodymium - Dysprosium - Europium - Yttrium - Terbium

Which of the following are potential reasons why ores grades of a mineral resource may trend toward lower grade ores in more recent times? (Choose all that apply.)

- Once a mine gets established, it doesn't want to leave (and it is more expensive to set up a new mine), so it continues on to the lower grade ores after going after the higher grade deposits. - Many of the best deposits have already been exploited and thus often we only find/use lower grade ores. - Machinery and methods and large-scale mining methods have improved to allow for less expensive production and thus the ability to use the lower grade ores

Match the physical layers of the Earth with the correct description.

- Outermost physical layer of the Earth. It is broken into segments called plates = Lithosphere - It is mechanically weak, this layer moves and flows due to convection currents created by heat coming from the earth's core = Asthenosphere - More rigid and immobile than the asthenosphere. Located at a depth of approximately 410 and 660 km below the earth's surface = mesosphere - The only entirely liquid layer within the Earth. Scientists believe the earth's magnetic field is generated by the circulation of molten iron and nickel within it = outer core - Hottest part of the Earth. Solid = inner core

Which of these are potential triggers for mass wasting events? (choose all that apply)

- Oversteeping - Rapid melting of snow or ice - Volcanic eruption - Heavy rain - Earthquake

Which of these are potential triggers for mass wasting events? (choose all that apply)

- Rapid melting of snow or ice - Freezing and thawing - Shaking from construction or mining - Heavy rain - Earthquake

Which of these is a source of non-point pollution? Choose all that apply.

- Residential areas - Fields of an agricultural area

Which of these are potential responses by consumers and manufacturers in the United States if China decided to restrict the export of rare earth elements (REE) to the United States as a part of the ongoing trade war? (Select all that apply.)

- Seek alternative minerals or products - Seek alternative sources of REE - Increase the use of recycled REE

Which of these energy sources would be considered renewable? (select all that apply)

- Solar - Hydroelectric - Wind

Match the description of deformation below with the correct type of deformation.

- Strain that is reversible after a stress is released: Elastic deformation - This occurs when enough stress is applied to a material that the changes in its shape are permanent, and the material is no longer able to revert to its original shape: ductile deformation - This occurs when rock integrity fails and the rock fractures under increasing stress: Brittle deformation

Which of these are common non-silicate mineral classes? Select all that apply.

- Sulfates - Oxides - Sulfides - Phosphates

Match the relative dating principle with its definition.

- Superposition = the layers on the bottom are the oldest and the layers above are younger - Original horizontality = layers of rock deposited from above, such as sediments and lava flows, originally were laid down horizontally - Lateral continuity = within the depositional basin in which they form, strata are continuous in all directions until they thin out at the edge - Cross- cutting relationships = faults and igneous intrusions that cut across rocks are younger than the rocks they cut across - Inclusions - when one rock formation contains pieces or inclusions of another rock, the inclusion is older than the host rock - Faunal succession = assemblages of fossils contained in strata are unique to the time they lived and can be used to correlate rocks

What are the two most important factors in the process of generating oil from organic remains?

- Temperature - Time

Why are mass movements common after large rainfall events such as the 2013 Front Range Flooding? (select all that apply)

- The addition of water decrease the resisting force - Increased water in streams erodes and undercuts hill slopes

Match the chemical layers of the Earth with the correct descriptions.

- The outermost chemical layer and the one we currently reside on. There are two types: ocean and continental = crust - The largest chemical layer by volume. Scientists hypothesize most of it is made of the rock peridotite = mantle - Consists mostly of iron, nickel, and possibly some oxygen = core

What are the two largest uses of water in the United States?

- Thermoelectric power - Irrigation

Match the descriptions below with the correct type of radioactive decay.

- Two protons and two neutrons are emitted from the nucleus of an atom = alpha decay - A neutron in its nucleus splits into an electron and a proton = beta decay - A proton in the nucleus captures an electron from one of the electron shells and becomes a neutron = electron capture

The Google Earth image below shows the distribution of earthquakes near Japan. Orange dots indicate shallow earthquakes, while green and blue dots indicate deeper earthquakes. Based on the topography, location of continents and the distribution of earthquakes, which of the following features would you expect to find at the plate boundary indicated by the arrow? (Choose all that apply.)

- Volcanoes - deep ocean trenches

Soil is made up of which of these components? (Select four.)

- Water - Air - Weathered rock - Organic material

Continental collisions are characterized by (select all that apply)

- Widespread shallow earthquakes - Broad mountainous regions

Which of these energy sources would be considered renewable? (select all that apply)

- Wind - Hydroelectric - Solar

An increase in Earth's average albedo leads to (select all that apply)

- an increase in the amount of solar radiation that is reflected - a decrease in the amount of solar radiation that is absorbed by Earth

Water is a very unusual substance with unique properties. Indicate unique properties of water compared to most other substances. (choose all that apply)

- as a solid, floats on its own liquid - high specific heat - Universal solvent - Molecular polarity - High cohesion - High adhesion

At a subduction zone, what is the cause(s) of melting? (Select all that apply.)

- heating - addition of water

Hydraulic fracturing (select all that apply).

-Is primarily used to extract oil or gas from shale - Increase the permeability of the rock - Is a process in which fluid and sand is pumped at high pressure into a rock to fracture it - Allows oil and gas to be extracted from source rocks

Which of the following factors would cause the cut-off grade of a mineral resource to rise? (Choose all that apply.)

-New benefaction technologies -Increased market price of the metal

Which of the following are ways of correlating rocks? (Select three that apply)

-time -age -rock type

Quartz has the chemical formula Si)2 and is made of a 3-D framework of silicate tetrahedron. How many directions of cleavage would you expect quartz to have?

Quartz is composed of a 3D framework of silicate tetrahedra, with no other elements included. How many directions of cleavage would you expect quartz to have?

What is the discharge of river that is 50 ft wide and 5 ft deep and flowing with a velocity of 4 ft/s?

An iphone has about 0.014 grams of gold in it. How many metric tons of 15 ppm grade gold ore need to be mined in order to get enough gold for a single iphone? Remember that 1 metric ton = 1,000,000 grams.

0.066

Using relative dating procedures, put the labeled rocks and geologic features in order from oldest (first - 1) to youngest (last - 11)

1 - J 2- K 3- F 4- H 5- B 6- G 7 - E 8- D 9- I 10 - C 11- A

Rank these elements in order of their abundance in Earth's continental crust? (1 is most abundant, 5 is least abundant)

1 = oxygen 2 = silicon 3 = aluminum 4 = iron 5 = calcium

Using the image shown below and your relative dating principles, put the rocks in the order that they formed from oldest (first - 1) to youngest (last - 8).

1 C, 2 H, 3 E, 4 G, 5 A, 6 F, 7 D, 8 B

Which of the following are on a plate boundary

1 and 3

What type of cleavage would you expect to find in Mica

1 direction

Approximately what percentage of the water on Earth is liquid, fresh water?

What percent of water on earth is liquid fresh water

What is the discharge of river that is 50 ft wide and 5 ft deep and flowing with a velocity of 4 ft/s?

1,000

If a metal ore has an average ore grade of 4%, how many pounds of ore must be mined in order to obtain 50 pounds of that metal?

1,2500

Approximately how far would a tectonic plate travel in an average human lifetime?

1- 10 meters

If a metal ore has an average ore grade of 25 ppm, how many metric tons of ore must be mined in order to obtain 30 grams of that metal? (remember there are 1,000,000 grams in 1 metric ton)

1.2

Potassium-40 is radioactive and decays into Argon-40. The half-life of Potassium-40 is 1.3 billion years. You measure the # of atoms of each isotope in a rock and find 250 atoms of Potassium-40 and 250 atoms of Argon-40. How old is this rock? Give your answer in billions of years.

1.3

What is the percentage of ore to waste (by weight) for the new underground mine?

1.3/0.3 = 433%

The graph below shows the peak streamflow for the Animas River at Durango, Colorado for the past 108 years. The discharge corresponding to a Moderate Flood Stage is 14,100 ft3/s. This value has been exceeded 2 times during the period of record. What is the approximate probability of Moderate Flooding on the Animas River at this location?

1.8%

What is the mean recurrence interval for magnitudes 5.0 - 5.9

1/ 0.23 = 4.3 years

The graph below shows the peak streamflow for the Mississippi River at St. Louis, Missouri for the past 155 years. The discharge corresponding to a Major Flood Stage is 750,000 ft3/s. This value has been exceeded 19 times during the period of record. What is the approximate probability of Major Flooding on the Mississippi River at this location each year? (Give your answer as a percentage.)

12.5/ 12.25

Approximately what percentage of the water on Earth is fresh water?

2.5%

Potassium-40 is radioactive and decays into Argon-40. The half-life of Potassium-40 is 1.3 billion years. You measure the # of atoms of each isotope in a rock and find 250 atoms of Potassium-40 and 750 atoms of Argon-40. How old is this rock? (Give your answer in billions of years)

2.6

If a metal ore has an average ore grade of 50 ppm, how many grams of ore must be mined in order to obtain 10 grams of that metal?

200,000

If a rock starts off with 100 radioactive parent atoms, how many parent atoms will be left after 2 half-lives?

After 2 half-lives, what percentage of the original parent isotopes would still be present?

25%

If a metal ore has an average ore grade of 15 ppm, how many metric tons of ore must be mined in order to obtain 45 grams of that metal? (remember there are 1,000,000 grams in 1 metric ton)

Potassium-40 is radioactive and decays into Argon-40. The half-life of Potassium-40 is 1.3 billion years. You measure the # of atom of each isotope and find 75 atoms of Potassium-40 and 525 atoms of Argon-40. How many half-lives have passed since the rock formed?

How many plates are shown in the diagram to the right? In the diagram to the right, which plate is subducting? how are points B and D moving relative to each other? how are points D and E moving relative to each other?

3 A B and D are moving away from each other D and E are not moving relative to each other

Questions #9-12 use this document to assess the seismic risk of two additional San Francisco schools that we did not assess during class: Sunset Ridge Elementary School and El Camino High School. How would you rate the Peak Ground Acceleration for El Camino High School? How would you rate the Liquefaction Potential for Sunset Ridge Elementary School? Which of these schools show evidence for soft stories? Using the risk factors spreadsheet that you used in class, calculate the Risk Factor for El Camino High School and Sunset Ridge Elementary School.

3 (>0.6g) 1 (low/ very low) Neither school has a soft story El Camino High School

The graph below shows the peak streamflow for the Ohio River at Louisville, KY. Flood stage at this site corresponds to 546,000 cubic feet per second. This discharge has been exceeded 46 times in the 152 years in the record. What is the approximate recurrence interval of flooding at this location? Practice exam didn't have the picture

3 years

If a metal ore has an average ore grade of 3%, how many pounds of ore must be mined in order to obtain 100 pounds of that metal?

3,333

Approximately what percentage of the water on Earth is fresh water?

3.5%

What percentage of freshwater is groundwater

30.1%

The graph below shows the peak streamflow for the Mississippi River at St. Louis, Missouri for the past 155 years. The discharge corresponding to a Major Flood Stage is 750,000 ft3/s. This value has been exceeded 19 times during the period of record. What is the approximate recurrence interval in years of Major Flooding on the Mississippi River at this location?

8 / 8.16

If a river has an average width of 10 m, an average depth of 4 m, and is flowing with a velocity of 2 m/s, what is its discharge?

There have been 7 earthquakes in the magnitude range 5.0-6.0 in the San Francisco area over the past 30 years. What is the probability of an earthquake in this magnitude range occurring in the next 30 years?

99.96%

At which of these sites would expect to find composite volcanoes? (Select all that apply.) At which of these sites would you expect to find basaltic lava? (Select all that apply.) At which of these sites would you be most worried about an explosive eruption?

A & B A B

Convergent

A and B represent locations on two separate plates. The curved black line represents the plate boundary. The arrows show the directions of plate motion and the rates of motion are indicated. What type of plate boundary is this?

Deposition in an environment without much oxygen, and the presence of organic matter

A black color in sedimentary rocks usually indicates ____________.

Transform

A line of shallow earthquakes with no volcanism is likely evidence of what type of plate boundary?

A river has a discharge of 200 cubic meters per second. It has a width of 10 meters and an average depth of 5 meters. What is its velocity? Give your answer in meters/second.

20m^3

A rock has 20% porosity and is completely saturated with water. What is the volume of water that is present in a 100 m3 section of the rock?

Which of these is the best description of a scientific study?

A scientific study involves making hypotheses, collecting data, and performing experiments or testing claims, to reach a conclusion supported by evidence.

3000km

A seismic station records an earthquake and the S-waves arrive about 4 minutes after the P-waves. Using the diagram below, determine how far away the earthquake epicenter is from the station.

Which of these options most likely accounts for the damage observed in the apartment building near Northridge, CA in the image below?

A soft story on the bottom floor

Which of the following settings would be most vulnerable to mass movements?

A steep mountain covered in a thick layer of sediments

What is a pyroclastic density current or pyroclastic flow?

A very hot (several 100°C) mixture of gases and volcanic tephra that flows rapidly (up to 100s of km/h) down the side of a volcano

Adding water to a rock can contribute to melting by

A, B, C, and D.

Alfred Wegener used which of these as lines of evidence supporting the hypothesis of continental drift? (Select all that apply.) A) the shapes of the continents B) the presence of identical fossil species along the coastal parts of Africa and South America C) the occurrence of glacial deposits in present-day arid Africa D) the presence of fossils of tropical plant fossils north of the Arctic Circle E) reversals of the Earth magnetic field in the geologic past F) presence of deep ocean trenches next to continents

What type of rock/ sediment is Qs

Alluvium (cobble and boulder gravel)

For earthquakes of the same magnitude, which of these would you expect to cause greater damage?

An earthquake with a shallower epicenter

Transport and deposition

As igneous rocks, as well as other types of rocks, on Earth's surface are exposed to weathering and erosion, sediments are produced. What event or process is likely to take place next in the rock cycle?

More, better, and smaller

As sediment is transported it usually becomes ________ rounded, _______ sorted, and _________ grain size

Broad shield volcano

At a hot spot under ocean crust, which type of volcano would you expect to find?

decompression

At a mid-ocean ridge, what is the primary mechanism of melting?

Below the water table, all of the pore spaces are saturated with water

Below

Dolomite has the chemical formula (Ca, Mg) Co3. which class of minerals would dolomite be placed

Carbonates

Which of these countries supplies the majority of the world's rare earth elements?

China

Fossil fuels

Coal Oil / petroleum Natural gas Other nontraditional fossil fuels Oil shale Oil sands and tar sands Shale gas Methane hydrate Non renewable energy resources

Rapid (flash) and short

Colorado tends to experience _______ flooding, due to ________ lag times between the peak in rainfall and the peak in stream

Mt. Rainier

Composite volcano (stratovolcano)

Transport and precipitation of uranium by groundwater

Concentrated deposits of Uranium ore are created by _______________.

At a subduction zone, which type of volcano would you expect to find?

Cone-shaped composite volcano

High and Low

Contact metamorphism occurs when rocks are exposed to _____ temperature and ______ pressure.

Mafic (ferromagnesian)

Contain mg and/ or fe, dark in color

What type of plate boundary is at the location indicated by the arrow between the Eurasian and Arabian plates

Continental collision

Which of these plate boundary types would you expect to find thick crust, reverse faults, and folds?

Continental collision

Broad mountainous regions, widespread shallow earthquakes.

Continental collisions are characterized by___________________. (select all that apply)

Widespread shallow earthquakes and broad mountainous regions

Continental collisions are characterized by___________________. (select all that apply)

B and E

Continental collisions are characterized by___________________. (select all that apply) A) Frequent volcanic eruptions B) Widespread Shallow Earthquakes C) A narrow mountain chain on the edge of the continent D) Deep earthquakes E) Broad mountainous rang ions

If you wanted to reconstruct ocean temperatures on short timescales (decades to centuries) with annual resolution, which of these archives would be the best target?

Corals

If you wanted to reconstruct temperatures on short timescales (decades to centuries) with annual resolution in the ocean, which of these archives would you target

Corals

Explore this Geologic Timeline created by PBS: http://www.pbs.org/wgbh/evolution/change/deeptime/ Or this one from UC Berkeley: https://ucmp.berkeley.edu/help/timeform.php At the end of which of these time intervals did the non-avian dinosaurs go extinct?

Cretacous

The map below shows the annual water balance for different parts of Colorado. Which area would you predict is more heavily dependent on groundwater? (can't see pict)

The schematic cross sections below illustrate four models of relative plate motions and plate boundary geometry. Which of the cross sections best represents the characteristics of the plate boundary at location 8 on the map below?

Which of the regions of the United States indicated on the map below would you expect to have the highest mass movement hazard?

Examine the diagram. The lettered objects represent volcanoes formed on an ocean plate above a hot spot. The arrow illustrates the direction of plate motion. Which volcano is the oldest? Examine the diagram. The lettered objects represent volcanoes formed on an ocean plate above a hot spot. The arrow illustrates the direction of plate motion. Which volcano is the youngest?

D C

The stratigraphic column below shows descriptions of the rock layers below Fort Collins. Which of the following would be the best choice for a source of groundwater? The stratigraphic column below shows descriptions of the rock layers below Fort Collins. Which of the following would likely make the best aquifer?

DAKOTA SANDSTONE/ group Niobrara group

Normal faults

Death Valley is a region that has very low elevation but has mountains with high relief. What type of faults would you predict created the relief in Death Valley?

What do tilt meters measure?

Deformation of the surface of the volcano

Which of these events occurred first

Deposition of muddy gray sandstone

Which of these events occurred fourth

Deposition of the reddish sandstone

New ocean crust is formed at which type of plate boundary?

Divergent

Why type of plate boundary encircles antarctica

Divergent

At which of these plate boundary types is new ocean crust produced?

Divergent boundary between two ocean plates

Hazards from collapsible soils tend to happen in areas with

Dry, low density soils

Which best explains how sunlight can easily pass through the atmosphere, but heat energy radiated from the Earth's surface has a harder time escaping the atmosphere?

Each unique wavelength of radiation interacts differently with atmospheric gases.

Based on the hydrograph shown below, at what time of year does the most water typically flow through the Cache la Poudre River?

Early summer

C, B, E, A, D.

Examine the diagram below. The lettered objects represent volcanoes formed on an oceanic plate above a hot spot. The arrow illustrates the direction of plate motion. In what order did the volcanoes form (oldest to youngest)?

Examine the diagram below. The lettered objects represent volcanoes formed on an oceanic plate above a hot spot. The arrow illustrates the direction of plate motion. Which volcano is the youngest?

Examine the map below and answer the question that follows. How many plates are present? `

the process of testing a hypothesis

Experiment

Brittle and shallow

Faults are an example of ________ deformation that occur at _________ depths in the crust.

Which of the following formulas represents an sulfide?

FeS2

Which of these magma compositions will generate the most gas pressure?

Felsic

Which of these events occurred second

Folding and uplift of the muddy gray sandstone

A, B, E, and H.

For oil to be produced, the following events must occur: (choose all that apply) A) microorganisms settle to the bottom of an ocean or lake after they die B) organic molecules are buried to greater depth by the accumulation of sediment C) plants are buried in coastal swamps D) dinosaurs consume plants E) microorganisms produce organic molecules through photosynthesis F) dinosaur bones are heated to 100 degrees C G) organic molecules are consumed by aerobic respiration H) organic molecules are preserved under low oxygen conditions

Igneous rocks

Formed from the cooling of a molten rock Classified by composition and texture Composition provides information about the source and evolution of the magma that formed it Texture = provides information about cooling history

Which of these is not a defining property of a mineral?

Formed within the earth

Which statement best describes the current state of US energy production and/or consumption?

Fossil fuels represent more than 80% of US energy consumption and the US is the world's largest oil producer

Which of these schools in the San Francisco area would we expect to experience the greatest intensity of shaking in the next 50 years?

Francisco middle school

Which of these schools in the San Francisco area would we expect to have the greatest landslide potential?

Garfield elementary school

How does the thickness of the crust beneath the rockies compare the surrounding areas

Generally thicker beneath the rockies

What would the metamorphic rock shown below be called?

Gneiss

what rock?

Gneissic foliation

In the image below there are pieces of a dark metamorphic rock included in a gray granite. Which rock is younger?

Gray granite is younger

The map below shows elevation of the water table in Long Island, NY. Which of these best describes the direction of groundwater flow?

Groundwater flows from the interior of the island towards the coast line.

Evaporation of saline water

Gypsum deposits, like most sulfates, are formed by _______________

Subduction zone

High Pressure/Low Temperature metamorphism is typically found at which tectonic environment?

Which type of metamorphism would you expect to have at a subducting plate

High p, low t

Which type of metamorphism would you expect to have at a divergent boundary

High t, low p

Which of these statements correctly describes the metamorphic rocks that would form in a contact metamorphic setting?

High-grade metamorphic rocks form closest to the magma chamber and low- grade metamorphic rocks form farther away

Which of these statements correctly describes the metamorphic rocks that would form in a contact metamorphic setting?

High-grade metamorphic rocks form closest to the magma chamber and low-grade metamorphic rocks form farther away

Which of these tectonic settings are you most likely to find the eruption of a felsic magma?

Hot spot under a continent

What is the biggest difference between hot-spot volcanism in an island chain and plate tectonic volcanism in an island arc?

Hot spots have age trends

How many directions of cleavage would you expect a silicate mineral that forms double chains of silicate tetrahedra to have?

A, B, C, and E.

Hydraulic fracturing ______________ (select all that apply). A) is primarily used to extract oil or gas from shale B) increase the permeability of the rock C) is a process in which fluid and sand is pumped at high pressure into a rock to fracture it D) is used in high permeability conventional reservoirs E) allows oil and gas to be extracted from source rocks F) is a process by which oil is produce from microorganisms

A tentative explanation

Hypothesis

At weak bonds between the silica tetrahedra and other elements

In silicate minerals, cleavage planes often occur ______________.

Thermoelectric power

In the eastern United States, ____________ is the largest use of water.

Cenozoic

In which of these Geologic time intervals did humans first appear?

Melt rocks

Increase temperature Decrease pressure Add water

Organisms that lived for relatively short time periods are particularly useful for dating rocks, especially if they were distributed over a wide geographic area and so can be used to compare rocks from different regions. These organisms are known as

Index fossils

subduction of an ocean plate at a shallow angle under the west coast of north america

It is thought that the formation of the Rocky Mountains was caused by ________________.

Remove Sediment

Keeping other variables the same, if the discharge of a river increases, will the river tend to build up sediment or remove sediment?

Which site on the cross section below is the most likely setting for an oil field (large accumulation of oil)?

Limestone at D

Tectonic plates are made up of which layer of the Earth. Choose the best answer.

Lithosphere

The rock pictured below is primarily composed of pyroxene and plagioclase feldspar. How would you describe its composition?

Mafic

What rock forms when limestone undergoes metamorphism?

Marble

Mechanism of melting and source of magma is different at different tectonic settings

What materials were used to determine the age of the Earth?

Meteorites

Which of the following features would not be found at a convergent boundary between an ocean plate and a continental plate?

Mid- ocean ridge

Is ocean crust more or less dense than continental crust?

More dense

Which of these fossil fuels are produced at a greater depth of burial?

Natural gas

What is the charge of a silicon-oxygen tetrahedron?

Negative 4

What happens when 2 continental plates converge

Neither subducts

Isotopes are atoms of the same element but have different numbers of

Neutrons

Cut off grade

New beneficiation technologies = fall Better (more equitable) labor agreements = rise Rise energy costs = rise More stringent environmental regulations = rise

Which of these Northeastern Colorado formations has most of the oil and natural gas being extracted from during the oil and gas boom of the past decade?

Niobrara formation

The image below shows an unconformity between granite on the bottom and sandstone on the top. What type of unconformity is this?

Nonconformity

What type of cleavage would you expect to find in quartz

None

Mosaic canyon- death valley

Normal fault

Thin

Normal faulting will tend to _____________ the crust.

Below is the hydrograph for the Cache la Poudre River for Nov. 6 - Nov. 13, 2015. Based on this data, which of these days would you predict that it had rained (assuming the lag time is less than one day for this location)? (select all that apply)

Nov 10 Nov 9

Which oxygen isotope, used in paleoclimatology, would be more easily evaporated and thus more concentrated in glacial ice?

O-16

The act of gathering new information

Observation

What type of plate boundary is at the location indicated by the arrow, between the Eurasian and Phillippine plate

Ocean - continental convergent

Which of these minerals would crystallize first from a cooling magma?

Olivine

Scrutiny of a study's methods, data, and results by experts in the field.

Peer Review

Explore this Geologic Timeline created by PBS: http://www.pbs.org/wgbh/evolution/change/deeptime/ Or this one from UC Berkeley: https://ucmp.berkeley.edu/help/timeform.php The most severe mass extinction in Earth's history occurred at the end of which of these time periods?

Permian

During which eon did life become abundant on Earth?

Phanerozoic

At the plate boundary indicated by the arrow, which plate is being subducted

Phillippine plate

The rock/sediment type indicated by the abbreviation Kpl is shale layer that is a member (part) of which formation?

Pierre shale

Potassium-40 is radioactive and decays into Argon-40. The half-life of Potassium-40 is 1.3 billion years. You measure the # of atom of each isotope and find 50 atoms of Potassium-40 and 750 atoms of Argon-40. How many half-lives have passed since the rock formed?

Which of these is considered the biggest hurdle in the path of REE production?

Processing REE ore

Melting at a subduction zone

Produce felsic intrusive rocks and intermediate extrusive rocks

1) Slate 2) Phyllite 3) Schist 4) Gneiss

Put these metamorphic rocks in order of increasing metamorphic grade from 1 (lowest grade) to 4 (highest grade). Schist Slate Gniess Phyllite

Volcanic hazards

Pyroclastic flow (ash flow) Mahar (mud flow or debris flow) Gases Ash falls Volcanic landslides Lava flows

What is the abbreviation of the rock/ sediment type that underlies CSU and most of the city of Fort collins

1) P Wave 2) S Wave 3) Surface Waves

Rank the seismic waves below in the order that they would arrive at a seismic station following an earthquake. S Wave Surface Waves P Wave

1) Mafic 2) Intermediate 3) Felsic

Rank these magma compositions from least viscous (1) to most viscous (3). Mafic Felsic Intermediate

Z -- midterm 1 practice exam

Quantitative vs qualitative data - Race Track Playa (in class) and another -Data from weather instruments -GPS measurements and rock movement Interpretation vs observation- Race Track Playa (in class) -Rocks have moved in the past Observation, not interpretation- Fort collins (in class) There is a river that flows toward the southeast through Fort Collins -The are to the West of Fort collins is steeper topography than to the east Observation vs interpretation- Race Track Playa (in class) → Which of the following statements about the Race Track Playa is an observation rather than an interpretation? -The rocks on the playa have a similar composition to those found in the surrounding mountains Science differs from Pseudoscience -Science can be proven wrong with enough evidence Match chemical layers of the Earth → 1st question on reading quiz 1- plate tectonics - Outermost layer= crust - Largest chemical layer = mantle - Consists mostly of iron, nickel, and some oxygen = core Examine map below--- how many plates = present → 6th question on homework quiz 1 - 5 Which plate boundaries have volcanoes → 1st question on homework quiz 1 - Ocean ocean convergent - Ocean- continent convergent - Ocean- ocean divergent Examine map-- youngest ocean crust → 7th question on homework quiz 1 - A Match physical layers of earth → 2nd question on reading quiz 1- plate tectonics - Outermost physical layer = lithosphere - Mechanically weak = asthenosphere - More rigid and immobile = mesosphere - Entirely liquid = outer core - Hottest part/ solid = inner core Examine map-- epicenter of deep earthquake→ 8th question on homework quiz 1 - D Google earth image of seafloor in the South American Ocean -- locate relative motion between south america and africa → hw quiz 1 uses image of seafloor in the indian ocean and need to locate divergent boundary - South America and Africa are moving away from each other Shallow earthquakes, no volcanism-- what plate boundary? - Transform Features at convergent boundary where subduction is taking place → 4th question on homework quiz 4 - Accretionary prism - Deep ocean trench - Deep earthquakes - Shallow earthquakes Volcanoes,A and B = 2 separate plates, curved black line = plate boundary and arrows = direction of plate motion and rates of motion. What type of plate boundary? → quizlet - Convergent Chalcopyrite (CuFeS2) -- which class of minerals? → quizlet → homework quiz 2 uses Magnetite (fe3O4), Molybdenite (MoS2), and Proxene ((NaCa)(MgFeAl)(Al Si)2O6)) - Sulfides Siderite (FeCO3) -- which class of minerals → quizlet - Carbonate Sphalerite (ZNS) -- which class of minerals - sulfide All minerals ___ (select all that apply) → 1st question on reading quiz 2- minerals and quizlet - Inorganic - Ordered internal structure - Specific chemical composition - Are natural - Solid Silicate minerals, cleavage planes occur ___ → 4th question on hw quiz 2 and quizlet - At weak bonds between the silica tetrahedra and other elements Image of rock -- asks about composition and gives hint (minerals = pyroxene, plagioclase, and olivine) → Note homework quiz 2 doesn't give hints like this - Mafic Adding water to a rock contributes to melting by___ → 8th question on reading quiz 3 - igneous rocks - Decreasing temperature at which the rock melts How would you describe the texture of the rock shown below? → Homework quiz 2 uses a different picture quizlet - Phaneritic (coarsely crystalline) How would you describe the composition of this rock? → 8th question on homework quiz 2 and reading quiz 3 - igneous rocks uses a different picture - Felsic igneous rock with a felsic composition that formed intrusively would be called a ____ → 6th question on reading quiz 3 - igneous rocks replaces felsic with mafic - Granite Feldspars typically produce what weathering products? → Sedimentary quizlet and section 5.2.2 - Clay minerals plus potassium, sodium and calcium in solution A black color in sedimentary rocks indicates (choose all that apply) → quizlet Deposition in an environment without much oxygen - The presence of organic matter A reddish color in sedimentary rocks indicates (choose all that apply) → 20th question on homework quiz 2 - Presence of iron oxides - Deposition in an environment with plenty of oxygen What rock fizzes when hydrochloric acid is dropped on it? → quizlet - Limestone Salt is an example of which type of sedimentary rock→ kind of similar to 1st question reading quiz 4-- sedimentary rocks - chemical The metamorphic rock shown below is composed of medium-fine interlocking crystals that fizz when hydrochloric acid is dropped on them. What is this rock?→ uses same picture as the 3rd question in reading quiz 5-- metamorphic rocks, but asks a different question - Marble Rock shown below = fine-grained platy mineral such as mica. What is it called → quizlet and uses a lot of these types of questions on homework quiz 2 - Slate Is this rock foliated → Reading quiz 5-- metamorphic rocks asks the same question with the same picture and uses a different picture for this same question - Yes Metamorphic rock stared as a sandstone before it was metamorphosed. Very hard and doesn't fizz under hydrochloric acid. What is this rock? → quizlet and this site - Quartzite The rock shown below contains large mica crystals and other platy minerals aligned in a parallel direction. What type of foliation does this rock display→ 6.2.1 in textbook uses a lot of these types of questions on homework quiz 2 - Schistosity

Reservoir

Relatively permeable rocks that allow migration and accumulation of oil and natural gas

Which type of fault is best matched with the appropriate plate boundary?

Right-lateral strike-slip fault and transform boundary

Which of these best describes the order of events that must have happened to explain the sedimentary rocks we see at red rocks

Rock a was deposited then rock b was deposited then the rocks were tilted

Which is the best description of an aquifer

Rock or sediment below ground that accommodates the flow and storage of groundwater.

A large rock body that moves as a unit along a planar surface would be classified as a

Rock slide

Rocks subjected to stress may deform brittlely or ductilely, depending on their depth in the crust and how rapidly the deformation happens.

Oxide

Rutile has the chemical formula TiO2, which class of minerals would rutile be placed?

Which of these could be the parent rock of quartzite

Sandstone

Which of these statements most accurately reflects how scientists know that the age of the Earth is approximately 4.56 billion years?

Scientists have used radioactive isotopes to date meteorites that formed at the same time as the Earth

the gradient of the river has decreased

Sediment tends to build up upstream of dams because

Soils on top of which of these rock types would you expect to be most at risk for swelling soils.

Shale

Which of these could be the parent rock of marble?

Shale

Which of these rocks and depositional environments is the most likely source for oil and/or natural gas?

Shale deposited in an inland sea environment

low and often a barrier

Shale has _________ permeability and is ________ groundwater flow

What type of volcano is this?

Shield volcano

What is the rock pictured above in the middle, labeled C?

Slate

Currently, the most widely accepted hypothesis for the formation of the Rocky Mountains involves

Subduction of an ocean plate at a shallow angle under western North America

shallow and deep earthquakes

Subduction zones

Gelena has the chemical formula PbS. which class of minerals would gelena be placed?

Sulfides

Which of these types of mining typically produces a greater disturbance of the land and a larger amount of waste rock?

Surface mining

What is the geological structure shown in this image called?

Syncline

In the eastern United States, THERMOELECTRIC POWER is the largest use of water.

THERMOELECTRIC POWER

Crust, lithospheric mantle, and asthenosphere

Tectonic plates are composed of ________ plus the ________________ and the _____________

age of earth

The Earth is 4.6 billion years old!

Plate b is subducting

The Google Earth image below shows a plate boundary where one ocean plate is subducting under another. Yellow dots indicate shallow earthquakes, while red and blue dots indicate deeper earthquakes. Triangles indicate volcanoes. Based on the topography, and the location of volcanoes and earthquakes, which Plate (A or B) is subducting?

What determines the ore grade of a mineral resource?

The concentration of the mineral resource in the rock

In an ocean- ocean convergent boundary, what determines which plate will subduct (go under the other one)

The density of the plate

A sea level rise (transgression) and then a sea level fall (regression)

The diagram below is a stratigraphic column for the Horsetooth Reservoir area. Examine the Dakota Group. It contains three rock members within the group, a sandstone on bottom, shale in the middle, and sandstone on top. What is the most likely interpretation of how sea level changed during the time that the Dakota Group was being deposited?

92.8

The diagram below shows the when different clams of the genus Mytiloides lived. If you find fossils of M. hattiru, M. kossmati, M. columbiarus, and M. lobiatus in the rock, but do not find M. subhercynius, which of these is the most likely age of the rock?

The failure of a slope typically occurs when:

The downslope force is greater than the resisting force

Isostasy

The equilibrium exists between parts of earths crust, which behaves as it consists of blocks floating on the underlying mantle

sediment/rock type

The figure below shows varying seismic hazard within the Seattle region. What is the most likely cause for the variabilty in shaking intensity expected in different areas?

The graph below shows the peak streamflow for the Big Thompson River at Loveland, CO. Flood stage at this site corresponds to 3,570 cubic feet per second. This discharge has been exceeded 4 times in the 39 years in the record. What is the approximate probability of flooding at this location in any given year? (give your answer as a percentage)

5.8

The graph below shows the peak streamflow for the Red River at Fargo, ND. Major flood stage at this site corresponds to 10,500 cubic feet per second. This discharge has been exceeded 20 times in the 116 years in the record. What is the approximate recurrence interval of major flooding at this location?

The two graphs below show GPS data from Station JRO-1, which is located on the north side of Mount St. Helens. What do the data indicate about the movement of this station between Sept. 25 and Nov. 24?

The ground deformed in a way that the station moved to the southeast

300

The hydrograph below show the discharge for the Cache la Poudre River for the month of October, 2018. Approximately what was the discharge of the river on October 27?

nonconformity

The image below shows an unconformity between granite on the bottom and sandstone on the top. What type of unconformity is this?

Why might some wells extract predominantly oil and some predominantly natural gas

The rocks underwent different burial histories

Read this article about a swarm of earthquakes at Yellowstone in 2017 - water is diffusing through small cracks in the subsurface... Why did they not increase the threat level of Yellowstone at the time, given the increase of seismic activity?

There were no other signs of volcanic unrest

High regional elevation

Thick crust, underlain by less dense crust, warm regions

Generally, which direction is the australian- indian plate moving

Toward the northeast

True

True or false: The United States is completely reliant on other countries for many mineral resources.

What type of cleavage would you expect to find in amphibole

Two directions

Use (demand) affects the supply and price of these minerals and also affects the amount of exploration and mining

J, K, F, H, B, G, E, D, I, C, and A

Using relative dating procedures, put the labeled rocks and geologic features in order from oldest (first - 1) to youngest (last - 11).

10 cm/s

Using the chart below, approximately, what is the minimum velocity required to transport a sand grain that has a diameter of 1 mm?

One silicon atom and four oxygen atoms

What is the silicate tetrahedron, the basic building block of silicate minerals?

right lateral strike slip fault

What type of fault created the offset in the streams shown in the image below?

Strike slip

What type of fault would occur as a result of shear stress?

Syncline

What type of fold is shown in the image below?

Meandering

What type of river channel is shown below?

How deep the rock is buried

Whether oil or natural gas is produced in a source rock depends on _________________.

Coal

Which energy source currently produces the most electricity in Colorado?

A and E

Which of the areas indicated on the map have a 2% probability of shaking equivalent to 0.4 (40%) of gravity or greater in the next 50 years? (Choose all that apply.)

A, C, and E.

Which of the areas indicated on the map have a 2% probability of shaking equivalent to 0.4 (40%) of gravity or greater in the next 50 years? (Choose all that apply.)

Silicates

Which of these mineral classes is most common in Earth's crust?

Quartz

Which of these minerals is the most resistant to weathering?

Strike slip fault

Which type of fault would you expect to find at a transform boundary?

What is the level of precision of GPS stations positioned on a volcano?

Within a centimeter

Are rare earth elements currently being mined in the United States?

Yes, there is on operational mine in california

Marine Plankton

_______ is the starting material for oil and natural gas

What type of unconformity is shown in the image below?

angular unconformity

What type of structure

anticline

folds

anticline and syncline

An igneous rock with a mafic composition that formed extrusively would be called a

basalt

BELOW the water table, all of the pore spaces are saturated with water

below

Which of these mechanisms could not have an influence on climate on timescales of years to decades

changes in earth's orbit

The rock pictured below contains crystals of the mineral halite. It formed in a shallow evaporative sea. Which type of sedimentary rock would it be classified as?

chemical

Which of these countries produces most of the world's supply of rare earth elements?

china

Lyons

clastic, fine sand (clast), well sorted, deposited far from their source, quartz mineral, sandstone (classified)

which statement is most accurate?

coal forms from decayed vegetation and oil and gas from microscopic marine organisms

Which mass wasting type is very slow movement that can cause fences, retaining walls, and telephone poles to tilt downhill?

creep

At a mid-ocean ridge, what is the primary mechanism of melting?

decompression

In a contact metamorphic setting, the grade of metamorphism should decrease as you move away from the magma chamber

decrease

Since the early 1980's, water use in the United States has

decreased

The areas from which streams collect water are separated into drainage basins, the borders of which are defined by local topographic highs.

drainage basins

Recent changes in atmospheric CO2 and temperature are faster than previous changes that we know about in the geologic record.

faster

Clastic sedimentary rocks are defined and named based mainly on their grain size while chemical sedimentary rocks are defined mainly on their composition

grain size

Which of these rocks pictured below is metamorphosed to the highest metamorphic grade? Which of these rocks pictured below is metamorphosed to the least metamorphic grade?

highest = A least = c

Whether oil or natural gas is produced in a source rock depends on how deep the rock is buried

how deep the rock is buried

How are rock types related in elevation in co

igneous and metamorphic rocks are located at high elevation

Which list of materials is in order from lowest viscosity to highest viscosity?

milk, olive oil, honey, peanut butter

Examine the map below and answer the question that follows. E is moving toward the southeast.

southeast

Radioactive decay

spontaneous change in the nucleus of an atom releasing matter or energy

What did you observe about this setting from the photos? Which of the following statements is not an observation that we could make from the photos we have seen Which of the following statements is an interpretation that we could make from the photos we have seen What caused the tracks next to rocks on the race track playa? What data did Richard Norris and his team collect to investigate how the rocks were moving Which of these data are quantitative

unanswered iclickers

Directed stress (choose all that apply)

- Are generated by the movement of lithospheric plates is an unequal balance of forces on a rock in one or more directions - occurs at much lower pressures than confining pressure and does not generate chemical reactions that change mineral composition and atomic structure

All minerals (Select all that apply)

- Are inorganic - Have a ordered internal structure - Have a specific chemical composition - Are natural - Are solid

Match these sedimentary structures with the correct description.

- Bedding plates = discernible layers of rocks - Graded bedding = a sequence of beds that either get coarser or finer - Plane beds = flat, parallel layers - Cross bedding = inclined layers within a bed - Bioturbation = action of burrowing organisms in soft sediments - Sole marks = features formed from the erosion into sediments by flow - Imbrication = stacking of clasts aligned in the direction of flow - Vugs = small voids in rocks

The Google Earth image below shows the age of the seafloor in the Indian Ocean. Young (recently formed) ocean crust is indicated by red. Which of the letters is located on a divergent boundary? (Choose all that apply.)

- C - A - D

What are the two primary sources of water for the City of Fort Collins?

- Cache la poudre river - Horsetooth river

Place these clastic sedimentary rocks in order from smallest grain size (1) to largest grain size (4).

- Claystone = 1 - Siltstone = 2 - Sandstone = 3 - Conglomerate = 4

Which of these energy sources can generally produce electricity "on-demand"? (select all that apply)

- Coal - Hydroelectric - Nuclear - Natural gas

Rank these fossil fuels by the amount of carbon dioxide emissions produced for a given amount of energy produced from 1 (most CO2) to 3 (least CO2).

- Coal - Oil - Natural gas

If the price of a mineral resource increases, which of these would you expect to occur? (choose all that apply)

- Consumers or product makers may seek a substitute mineral or product - Consumer demand for the mineral resource may decrease - Mining may increase to increase the mineral supply

Match the descriptions below with the correct term defining the igneous rock composition.

- Contains a predominance of the light-colored (felsic) minerals feldspar and silica in the form of quartz. Rich in silica (in the 65-75% range, meaning the rock would be 65-75% weight percent SiO2) and poor in iron and magnesium. = felsic - Usually contains roughly-equal amounts of light and dark minerals, including light grains of plagioclase feldspar and dark minerals like amphibole. Contains silica in the 55-60% range. = intermediate - Contains an abundance of ferromagnesian minerals (with magnesium and iron, chemical symbols Mg and Fe) plus plagioclase feldspar. It is mostly made of dark minerals like pyroxene and olivine, which are rich in iron and magnesium and relatively poor in silica. Silica in the 45-50% range. = mafic - Rocks composed of mostly olivine and some pyroxene which have even more magnesium and iron and even less silica. These rocks are rare on the surface, but make up peridotite, the rock of the upper mantle. It is poor in silica, in the 40% or less range. = ultra-mafic

Determine if the descriptions below would correspond to intrusive or extrusive igneous rock

- Cools quickly on earth's surface = extrusive - Cools slowly within earth's crust = intrusive - Contains tiny microscopic crystals = extrusive - Contains larger crystals that can be seen with the naked eye = intrusive

Which of the following conditions would increase the Moment Magnitude of an earthquake? (Select all that apply.)

- Increase the area of the fault that slips - Increase the distance that the fault slips - Increase the rigidity of the rock

Which of the following factors would cause the cut-off grade of a mineral resource to fall? (Choose all that apply.)

- Increased market price of the material - New benefaction technologies

Which of these could cause the designation of the 100-year flood for a river to change? (select all that apply)

- Installation of flood controls - Urban development - Collection of more data

Thinking about the water cycle, what can happen to water after falling to Earth as precipitation? (choose all that apply)

- It runs off - It evaporates - It infiltrates

Match the mineral class with some common uses of minerals in that class.

- Jewelry, coins, industry = native elements - Lime, portland cement = carbonates - Ores of iron and aluminum, pigments = oxides - Table salt, fertilizer = halides - Ores of lead, copper, mercury = sulfides - Sheetrock, therapeutic soak = sulfates - Fertilizer, teeth, bones = phosphates

Which of these characteristics of a drainage basin would tend to promote a longer lag time between a rainfall event and peak discharge? (choose all that apply)

- Large drainage basin - More vegetation - Thick soils

Rank these magma compositions from most viscous (1) to least viscous (3).

- Mafic = 3 - Intermediate = 2 - Felsic = 1

Magma viscosity is primarily dependent upon which two factors?

- Magma temperature - Magma composition

At which type(s) of plate boundaries are you likely to have volcanoes? (Select all that apply.)

- Ocean- ocean convergent - Ocean- continent convergent - Ocean- ocean divergent

For oil to be produced, the following events must occur: (choose all that apply)

- Organic molecules are preserved under low oxygen conditions - Microorganism settle to the bottom of an ocean or lake after they die - Microorganisms produce organic molecules through photosynthesis

For oil to be produced, the following events must occur: (choose all that apply

- Organic molecules are preserved under low oxygen conditions - Microorganisms settle to the bottom of an ocean or lake after they die - Organic molecules are buried to greater depth by the accumulation of sediment - Microorganisms produce organic molecules through photosynthesis

Sandstones are commonly made up of quartz sand grains. Why is quartz the most common mineral found in sandstones? (Select all that apply.)

- Other minerals, such as feldspars, will break down to clays - Quartz is chemically resistant to weathering

Indicate the order in which these seismic waves would arrive at a seismic station following an earthquake

- P waves = first - S- waves = second - Surface waves = third

Match the igneous rocks below with the correct texture.

- Phaneritic = A - Aphanitic = B - Pegmatitic = F - Glassy = E - Vesicular = D - Porphyritic = C

Which of these can be done to minimize the potential problem of tailings? (select all that apply)

- Putting plastic liners underneath the tailings pond - Cap the tailings ponds with an impermeable liner. - Treat the water from the tailings pond to neutralize the acids.

Which of these are true statements about rare earth elements (REE)? (select all that apply)

- REEs are elements include the Lanthanide group and Yttrium - REEs have partially filled f electron orbitals

Which of the following factors would cause the cut-off grade of a mineral resource to rise? (Choose all that apply.)

- Rise energy costs - Better (more equitable) labor agreements - More stringent environmental regulations

Which of these factors will affect the shear strength of material on a slope? (choose all that apply)

- Rock type - Amount of water the material contains - The orientation of bedding of metamorphic layers - Cohesion of sediments

Which of these are examples of clastic sedimentary rocks? (select all that apply)

- Sandstone - Siltstone - Breccia - Shale

Which of these metamorphic rocks can form from shale? (Select all that apply)

- Schist - Gneiss - Slate - Phyllite

- Seek alternative sources of REE - Seek alternative minerals or products - Increase the use of recycled REE

Which of the following are possible impacts of over-pumping groundwater? (select all that apply)

- Shallow wells become dry - Declining water table - Ground subsidence

Put these metamorphic rocks in order of increasing metamorphic grade from 1 (lowest grade) to 4 (highest grade).

- Slate = 1 - Phyllite = 2 - Schist = 3 - Gneiss = 4

Match the oil and gas terms below with the correct description.

- Source rock = organic matter-bearing rock which the formation of gas and oil takes place -Reservoir = relatively permeable rocks that allow migration and accumulation of oil and natural gas - Trap = structure of arrangement of rocks that lead to the accumulation of oil or gas - Seal = impermeable rocks that prevents migration of oil or gas

match the oil and gas terms below with the correct description

- Source rock: organic matter-bearing rock within which the formation of gas and oil takes place - Reservoir: relatively permeable rocks that allow migration and accumulation of oil and natural gas - Trap:structure or arrangement of rocks that leads to the accumulation of oil or gas - Seal: impermeable rock that prevents migration of oil or gas

Match the relative dating principle with its definition. (relative dating quiz 7)

Match the definition on the left with the correct term.

- The process of concentrating a mineral resource following extraction. = benefaction - A process during which the crushed ore is placed in a rotating drum with steel rods or balls = milling - A process during which a rock slurry is mixed with a selected reagent that adds bubbles. = flotation - The use of chemicals (such as sulfuric acid or sodium cyanide) to dissolve only the desired metals = leaching - A process to separate a metal from a mineral by heating the mineral = smelting

Match the descriptions below with the correct soil horizon.

- The top horizon is a thin layer of predominantly organic material, such as leaves, twigs, and other plant parts that are actively decaying into humus = 0 horizon - This layer is often referred to as top soil. It consists of humus mixed with mineral sediment = A horizon - Also called subsoil, this layer consists of sediment mixed with humus removed from the upper layers. The subsoil is where mineral sediment is chemically weathered. = B horizon - This is substratum and is a zone of mechanical weathering. Here, bedrock fragments are physically broken but not chemically altered. This layer contains no organic material. = C horizon - The final layer consists of unweathered, parent bedrock and fragments. = R horizon

Match the depositional environments listed below with the types of sediment that are typically found there.

- Very fine muds and oozes, diatomaceous Earth = abyssal - Very well sorted sand = littoral (beach) - Lime mud with coral = reef - Sand and mud, can have larger sediments = fluvial (river) - Mud to boulder, poorly sorted = glacial - Very well sorted sand and silt = aeolian (dunes)

Which of the following are advantages of using nuclear energy to generate electricity? (choose all that apply)

- Very low emissions of carbon dioxide and air pollutants - Relatively safe - Has a high energy output - On demand energy source

Which of these features would you expect to find at a convergent boundary where subduction is taking place? (select all that apply)

- Volcanoes - Deep ocean trench - Accretionary prism - Shallow earthquakes - Deep earthquakes

Which of these features would you expect to find at a divergent boundary? (Select all that apply.)

- Volcanoes - Shallow earthquakes - Ridge of elevated seafloor

Match the type of unconformity with the correct description.

- Where is a break or stratigraphic absence between strata in an otherwise parallel sequence of strata: disconformity - where sedimentary strata are deposited on crystalline (igneous or metamorphic) rocks: nonconformity - where sedimentary strata are deposited on a terrain developed on sedimentary strata that have been deformed by tilting, folding, and/or faulting. so that they are no longer horizontal: angular unconformity

Hydraulic fracturing (select all that apply)

- is a process in which fluid and sand is pumped at high pressure into a rock to fracture it - allows oil and gas to be extracted from source rocks - increase the permeability of the rock - is primarily used to extract oil or gas from shale

For oil to be produced, the following events must occur: (choose all that apply)

- microorganisms settle to the bottom of an ocean or lake after they die - organic molecules are buried to greater depth by the accumulation of sediment - microorganisms produce organic molecules through photosynthesis - organic molecules are preserved under low oxygen conditions

Which of these energy sources produce carbon dioxide as a waste during electricity production (excluding emissions resulting from manufacturing of equipment)? (select all that apply)

- natural gas - coal

What are the two largest uses of water in the United States?

- thermoelectric power - irrigation

Match these descriptions of processes associated with lithification with the correct term.

- when friction and gravity overcome the forces driving sediment transport, allowing sediment to accumulate = deposition - when material continues to accumulate on top of the sediment layer, squeezing the grains together and driving out water = compaction - minerals coating the sediment grains and gluing them together into a fused rock = cementation

Match the type of unconformity with the correct description.

- where is a break or stratigraphic absence between strata in an otherwise parallel sequence of strata = disconformity - where sedimentary strata are deposited on crystalline (igneous or metamorphic) rocks = nonconformity - where sedimentary strata are deposited on a terrain developed on sedimentary strata that have been deformed by tilting, folding, and/or faulting. so that they are no longer horizontal = angular unconformity

Which of the following changes to the crust would act to increase regional elevations? (Choose all that apply.)

-Heat the crust - Decrease the density of the crust - Thicken the crust

Which of these products are rare earth elements used in? (select all that apply)

-Rechargeable batteries -Magnets -Fluorescent light bulbs - Tv and computer screens

A reddish color in sedimentary rocks usually indicates (choose all that apply)

-deposition in an environment with plenty of oxygen -the presence of iron oxides

Questions #1-8 involve the calculation of earthquake recurrence intervals and probabilities for the Los Angeles area. Please use this table to answering these questions, using the procedures you learned in class focusing on the San Francisco area. What is the mean recurrence interval (MRI) in years for earthquakes within the magnitude range 5.0-5.9? What do you estimate that the mean recurrence interval (MRI) in years would be for earthquakes within the magnitude range 7.0-7.9 in the Los Angeles area? Approximately, what do you estimate that the mean recurrence interval (MRI) in years would be for earthquakes within the magnitude range 8.0-8.9 in the Los Angeles area? What is the one year probability of an earthquake in the magnitude range 4.0-4.9 occurring in the Los Angeles area? Give your answer as a %. Approximately, what is the one year probability of an earthquake in the magnitude range 7.0-7.9 occurring in the Los Angeles area? What is the probability of an earthquake in the magnitude range 6.0-6.9 occurring in the Los Angeles area in the next 30 years? Give your answer as a %. Approximately, what is the probability of an earthquake in the magnitude range 7.0-7.9 occurring in the Los Angeles area in the next 30 years Approximately, what is the probability of an earthquake in the magnitude range 8.0-8.9 occurring in the Los Angeles area in the next 30 years?

1.2 150 1,500 years 100 0.7% 88% 18% 2%

There have been 2 earthquakes in the magnitude range 6.0-7.0 in the San Francisco area over the past 30 years. What is the Mean Recurrence Interval of earthquakes in this magnitude range?

15 years

The approximate percentage of land surface used for pit mining as compared to that used in mine waste storage is

15-30%

The graph below shows the peak streamflow for the Gunnison River at Grand Junction, CO. Flood stage at this site corresponds to 17,400 cubic feet per second. This discharge has been exceeded 19 times in the 120 years in the record. What is the approximate probability of flooding at this location in any given year? (Give your answer as a percentage.)

16.6/ 15.9

During what decade were many of the first U.S. federal regulations in the interest of protecting human health and the environment enacted?

1970s

Rank these reservoirs of water according to their volume. (1 = greatest volume; 4 = least volume)

1= oceans 2= glaciers and ice sheets 3 = groundwater 4 = lakes 5 = atmosphere 6 = rivers

Amphibole forms an internal structure made of double chains of silicate tetrahedron. How many directions of cleavage would you expect amphibole to have?

How many directions of cleavage would you expect a silicate mineral that forms single chains of silicate tetrahedra to have?

Cleavage in feldspars

2 directions

Radiocarbon (C-14) has a half life of 5730 years. It would be most useful to date

2,000 year old charcoal from an archeological site

If a metal ore has an average ore grade of 4%, how many pounds of ore must be mined in order to obtain 100 pounds of that metal?

2,500

What is the current estimate for how much Earth's temperature will increase if the concentration of CO2 in the atmosphere is doubled?

2-4.5 degrees C

Potassium-40 is radioactive and decays into Argon-40. The half-life of Potassium-40 is 1.3 billion years. You measure the # of atoms of each isotope in a rock and find 50 atoms of Potassium-40 and 150 atoms of Argon-40. Approximately, how old is this rock?

2.6 billion

Approximately, what percentage of Colorado's electricity is currently generated from renewable energy sources?

25%

How many tectonic plates are shown in the diagram below?

How many metric tons of 15 ppm grade gold ore need to be mined in order to get enough gold for a single Krugerrand? Remember that 1 metric ton = 1x106grams.

31.1035 g Au x (1x106 g ore/15 g Au) = 2.1x106 g of ore. 2.1x106 g of ore x (1 metric ton/1x106 g) = 2.1 metric tons of ore per single coin.

A river has a discharge of 200 cubic meters per second. Its width is 10 meters and its average velocity is 5 meters/second. What is its depth?

What is the currently scientifically accepted age of the Earth?

4.54 billion years old

How many pounds of 0.6% grade copper ore needs to be mined in order to obtain 420 pounds of copper

420 lbs cu x (100 lbs ore/ 0.6 lbs cu) = 70,000 lbs of ore

Examine the map below and answer the question that follows. How many plates are present?

How many plates are shown in the diagram to the right? In the diagram to the right, which plate is subducting? In the diagram to the right, how are points D and E moving relative to each other?

5 D and E are moving away from each other C and D are moving towards each other

If a metal ore has an average ore grade of 2%, how many pounds of ore must be mined in order to obtain 100 pounds of that metal?

5,000

If a metal ore has an average ore grade of 10 ppm, how many grams of ore must be mined in order to obtain 20 grams of that metal?

500,000

The graph below shows the peak streamflow for the Animas River at Durango, Colorado for the past 108 years. The discharge corresponding to a Moderate Flood Stage is 14,100 ft3/s. This value has been exceeded 2 times during the period of record. What is the approximate recurrence interval of Moderate Flooding on the Animas River at this location?

54 years

After 4 half-lives, what percentage of the original parent isotopes would still be present in a rock?

6.25%

According to a 2004 study published in the prestigious journal of Science, 97% percentage of climate scientists agree that warming is from human activities.

97%

Examine the diagram below. The lettered objects represent volcanoes formed on an oceanic plate above a hot spot. The arrow illustrates the direction of plate motion. Which volcano is the youngest?

Examine the idealized maps which illustrate an oceanic ridge (double lines) separated by a transform boundary. Which image shows the correct plate motions associated with the transform boundary?

Examine the map above and answer the question that follows. Where would you find the youngest ocean crust?

The map below shows the plate configurations along the western margin of North America. Which of the four diagrams on the right best represents a cross section through the outer layers of Earth along the line XY?

Which of the diagrams below best represents the change in the % of the parent isotope remaining as radioactive decay occurs?

Which rock is older the limestone (A) or the igneous sill (B)

Which of these best describes a 100-year flood?

A 100-year flood has a 1 in 100 chance of being equaled or exceeded in any year

What is a lahar?

A flow of mud and debris down a channel leading away from a volcano

If ore grades (the concentration of the metal within the ore) have decreased toward more recent times, yet production of the metal has increased, then what are the implications for the amount of ore that must be mined to allow production of the metal to stay the same or to increase?

A greater amount of ore must be mined

What percentage of freshwater is groundwater?

About 30.1%

Silt and clay

According to the diagram below, if a river has a velocity of 0.1 cm/s, which grain sizes can be transported by the river?

Which represents the longest interval of geological time?

An eon

An increase in greenhouse gas concentrations in the atmosphere causes

An increase in the amount of outgoing long wave radiation that is absorbed by the atmosphere

At a subduction zone setting, what type of volcanic igneous rock would most expect to find?

Andesite

The steepest angle at which sediments will be stable and NOT move down hill is called

Angle of repose

What type of unconformity can be observed at siccar point

Angular unconformity

Which type of coal has the highest carbon content?

Anthracite

What type of fold is shown in the image below? (can't see image on practice test)

Anticline

What type of structure

Anticline

which of these terms would best describe the texture of the igneous rock pictured to the right? The rock pictured to the right contains pyroxene and plagioclase feldspar. How would you classify its composition? What would the rock pictured to the right be called?

Aphanitic Mafic Basalt

Approximately what percentage of the water on Earth is liquid, fresh water?

Which list contains the names of the three eons in order from oldest to youngest?

Archean, proterozoic, phanerozoic

Loose, unconsolidated sediments

Areas underlain by which of these rock/soil types will have the greatest amplitude of shaking for a given earthquake?

The Mantle

At a mid-ocean ridge, what is the primary source of magma?

At a subduction zone, what are the source(s) of magma? (Select all that apply.) A) Ocean Crust B) Continental Crust C) The Mantle

A, and C.

At a subduction zone, what is the cause(s) of melting? (Select all that apply.) A) Heating B) Decompression C) Addition of water

Continental Crust and The Mantle

At a subduction zone, where an ocean plate and a continental plate are converging, what are the source(s) of magma? (Choose all that apply) Continental Crust The Mantle Ocean Crust

Mafic magma produced in the mantle mixes with felsic magma produced by melting the continental crust.

At an ocean-continent convergent boundary, the extrusive igneous rocks that are produced are typically intermediate in composition. Why?

A, and B.

At an ocean-continent convergent boundary, what are the primary source(s) of magma? (Select all that apply.) A) The Mantle B) Continental Crust C) Ocean Crust

In silicate minerals, cleavage planes often occur

At weak bonds between the silica tetrahedra and other elements

At which of these sites would you expect to find andesite? (Select all that apply.)

Using the figure below, and your relative dating principles, which of the 3 Rhyolite Dikes is oldest?

Which rock is older the felsic igneous rock (A) or the mafic igneous rock (B)

Oldest to youngest

B, A, C, D

If a region has extensive reverse faulting and folding, would you expect that region to have high regional elevation, high relief, or both?

BOTH

WUAZ

Based on the seismograms shown below, which station is farthest from the epicenter of the earthquake?

A, E, and F.

Based on your understanding of the defining characteristics of a mineral, which of these common substances would be classified as a mineral? (select all that apply) A) Ice B) Water C) Wood D) Glass E) diamond F) Salt

The sediment pictured below is mostly sand-sized, but contains some some pebbles and shell fragments. Which of the these is the most likely depositional environment for this sediment?

Beach

Which of these is the LEAST likely depositional environment for the rock composed of clay-sized clasts pictured below?

Beach environment influenced by waves

The diagram below shows rock units with their ages in millions of years. When did crustal deformation (uplift or mountain building) occur?

Between 60- 200 million years ago

The diagram below shows rock units with their ages in millions of years. When did crustal deformation (uplift or mountain building) occur?

Between 60- 200 million years old

Renewable energy sources

Biomass (burning of wood, biofuels - ethanol and biodiesel, or waste Hydroelectric power (using flowing water to produce energy) Solar wind Wind energy Tidal and wave energy Geothermal energy

Based on the boundary types illustrated, which of the figures below most accurately represents the relative plate motions for the Juan de Fuca and North American plates?

The Google Earth Image below shows the topography of South America. Which region indicated by the letters would you expect to have the most tectonic activity (e.g. earthquakes and volcanoes)?

250

C-14 (Radiocarbon) is radioactive and decays into N-14 with a half-life of 5730 years. Assume a rock starts with 1000 atoms of C-14. if the rock is 11,460 years old, how many C-14 atoms should be left?

2500

C-14 (Radiocarbon) is radioactive and decays into N-14 with a half-life of 5730 years. Assume a rock starts with 20,000 atoms of C-14. if the rock is 17,190 years old, how many C-14 atoms should be left?

11460

C-14 (Radiocarbon) is radioactive and decays into N-14 with a half-life of 5730 years. You have measured the number of atoms of C-14 in a piece of charcoal from an archeological site and find 250 atoms. Assuming the charcoal started with 1000 atoms of C-14, how old is the charcoal?

The graph below shows a record of the 18O/16O ratio in the ocean over the entire Cenozoic. What is the general trend in climate from the early Eocene to the present? → cooling

COOLING

Calculate the discharge of a river that is 10 meters wide, 3 meters deep, 60 kilometers long and flows with a velocity of 2 meters/second. Give your answer in cubic meters/second.

Which class of minerals would rhodochrosite (mnCO3) go in

Carbonates

Sulfide

Cinnabar has the chemical formula HgS, which class of minerals would cinnabar be placed?

Which of the following would likely have the lowest permeability?

Clay

Swelling soils occur when water is added to which type of minerals?

Clay minerals

Which of type of volcano would you expect to find in the Pacific Northwest?

Cone shaped composite volcano

At a subduction zone, which type of volcano would you expect to find?

Cone- shaped composite volcano

Which of these sedimentary rocks contains clasts that are larger than sand?

Conglomerate

The rock pictured to the right contains rounded cobble, pebble, and sand-sized clasts, what would this rock be called? Which of these would be the most likely depositional environment for the rock pictured to the right?

Conglomerate Steep river channel

Large, wide mountain ranges (himalayas and tibetan plateau)

Continental collision

Which of these plate boundary types typically do not have volcanoes?

Convergent boundary between two continental plates

Why are there mountains at divergent boundaries

Crust at the boundary is less dense

Examine the map below and answer the question that follows. Where would you be most likely to find the epicenter of a deep (more than 300 km) earthquake?

Which of the locations indicated on the map below would you predict would have the greatest swelling soil hazard?

Oldest to youngest

D, C, B, A

What is the cause of melting that produces magma at a mid- ocean ridge

Decompression

What is the mechanism of melting at the mid atlantic ridge

Decompression

What is the mechanism of melting at a hot spot

Decompression Heating

Which of these would be the most likely depositional environment for the sedimentary rock pictured below that contains clay-sized clasts?

Deeper ocean away from shore

relatively shallow earthquakes

Divergent boundary

During metamorphism, the minerals in a rock can recrystallize into other minerals, migrate within the rock, and be deformed to become aligned in a preferred direction.

How has Earth's average temperature changed over the last 2,000 years?

Earth's temperature had been generally decreasing, prior to the recent warming over the past 150 years

P waves and S waves

Earthquake early warning systems take advantage of the fact that ________ arrive first at seismic stations but _________ are more damaging.

Questions 2-4 will use the geologic map of the Boulder - Fort Collins area What type of rock/sediment is at the surface covering much of the eastern part of the map (indicated by the abbreviation Qe)?

Eolium (windblown clay, silt, sand, and granules)

Which of these events occurred third

Erosion down into the muddy gray sandstone

Examine the diagram below that shows a section of Earth's outer layers. Which location contains the oldest rocks that were originally formed at an oceanic ridge?

Examine the diagram below that shows oceanic and continental crust surrounding a plate boundary. Based on the current plate tectonic setting, location X is moving toward ____?

Examine the diagram below that shows oceanic and continental crust surrounding a plate boundary. Based on the current plate tectonic setting, location Y is moving toward ____

How would you describe the composition of the boulder creek rock

Felsic Intermediate

Which statement best describes the current state of US energy production and/or consumption?

Fossil fuels represent more than 80% of US energy consumption and the US is the world's largest oil producer.

Review the map of the plates below and identify which pair of locations is moving further apart as a result of plate tectonics.

Galapagos islands and hawaii

Gneissic banding is a metamorphic foliation in which visible silicate minerals separate into dark and light bands or lineations.

Which material would consistently make the best aquifer?

Gravel

Review the map of the plates below and identify which pair of locations is moving closer together as a result of plate tectonics.

Hawaii and Tokyo

At a subduction zone, what is the cause(s) of melting? (Select all that apply.)

Heating Addition of water

What are the mechanisms of melting at south american subduction zone

Heating Addition of water

How many plates are presented in the map below?

Intermediate

How would you describe the composition of the rock shown below?

Which of these terms is defined as the point within the Earth where the earthquake occurred?

Hypocenter

Where is most fresh water on Earth held?

Ice sheets and glaciers

Continental rift - Divergent, Mid-ocean ridges - Divergent, Subduction - Convergent, Collisions - Convergent, Plates shear past each other - Transform, Deep earthquakes - convergent

Identify whether the features listed below occur at divergent, convergent or transform boundaries. Continental rift - ________ Mid-Ocean ridges- ________ subduction- ________ collisions- _________ plates shear past each other - _______ deep earthquakes - _______

The likelihood of an earthquake on the fault is currently greater than the long-term likelihood of an earthquake on the fault

If the "readiness" of a fault is greater than 1, it means that ________________.

Amphibole

In a cooling magma, which of these minerals would crystallize first?

In a reverse fault, the hanging wall moves ______________ relative to the footwall.

Upper Rock

In the image below is sandstone and shale. Which rock is the sandstone?

Increase the rate of groundwater flow

Increase the permeability

Approximately, how has Earth's average temperature changed since 1850?

Increased by about 1 degree C

Approximately, how has Earth's average temperature changed since 1850?

Increased by about 1 degrees C

Which of these changes would result in more brittle deformation (as opposed to ductile deformation)?

Increased strain rate

Which scale would you use if you wanted to measure the amount of shaking felt by people and damage that occurred as a result of an earthquake?

Intensity scale

Which magma composition would you expect to create a cone-shaped composite volcano?

Intermediate

Texture of the boulder creek rock

Intrusive (plutonic) Phaneritic (coarsely crystalline)

Intrusive / plutonic

Intrusive igneous rocks are formed from magma that cools slowly and as a result these rocks are coarse grained

Which of these sectors uses the most water in Colorado?

Irrigation

Intrusive

Is the igneous rock shown below intrusive or extrusive?

Yes

Is this rock foliated?

Interpreting environment where sedimentary rocks formed

Larger grain size = greater energy in environment where sediment is deposited (waves, current) Smaller grain size = less energy in environment where sediment is deposited

Which of these volcano monitoring methods can create detailed images of the volcano surface?

Lidar

Which of these is the comparison and correlation of strata within a region by examining the physical properties of the rock and its sequence with other strata.

Lithospheric correlation

Areas underlain by which of these rock/soil types will have the greatest amplitude of shaking for a given earthquake?

Loose, unconsolidated sediments

Which rocks are older, the lower gray muddy sandstone or the upper reddish sandstone

Lower gray muddy sandstone

Youngest

Mafic intrusion (F)

Mafic minerals melt/ crystallized at higher temperatures than felsic minerals

Mafic rocks melt at higher temperatures than felsic rocks

Climate has changed in the past. What has caused the series of major climate fluctuations on thousand year time scales of the last 5 million years?

Milankovitch cycles

Anion

Minerals are classified according to the ____________ part of their chemical formula

Mining (particularly from mining for metals) has impacts on the environment and human health. Decisions about when and where to mine are complex, integrating concepts such as ore grade, economics, and impacts

If the cost of mining and processing a mineral resource is reduced by the adoption of more efficient technology, which of these will likely occur?

Mining will increase

Hydrothermal fluids

Molybdenite deposits, like many sulfide deposits, are often formed by

What type of structure can be observed in this image?

Monocline

Which types of plate boundaries are you likely to find mountains

Ocean ocean divergent Ocean - continental convergent Continental collision

Which types of plate boundaries are you likely to find volcanoes

Ocean ocean divergent Ocean continental convergent

ocean and continental crust

Ocean plate (denser) will subduct continental crust

Tectonic setting along west coast of washington

Ocean- continent convergent

The Google Earth image below shows the distribution of earthquakes south of Alaska. Orange dots indicate shallow earthquakes, while green and blue dots indicate deeper earthquakes. Based on the topography, location of continents and the distribution of earthquakes, what type of plate boundary is at the location indicated by the arrow?

Ocean- continent convergent

Which types of plate boundaries are you likely to find earthquakes

Ocean- ocean divergent Ocean - continental convergent Transform Continental collision

Rank these reservoirs of water according to their volume. (1 = greatest volume; 4 = least volume)

Oceans, glaciers and ice sheets, groundwater, rivers and lakes

Which statement best describes recent trends in US coal and oil production?

Oil production has increased and coal production has decreased.

which of these is a mafic silicate mineral?

Olivine (Mg,Fe)2SiO4

South

On the map below, Point B is moving toward the ___________.

Which of these lists correctly ranks the abundance of the top 5 elements in Earth's continental crust from most abundant to least abundant

Oxygen, Silicon, Aluminum, Iron, Calcium

At the plate boundary indicated by the arrow, which plate is being subducted

Pacific plate

In which of these Geologic time intervals did the first animals with shells appear

Paleozoic

Which of these silicate minerals is felsic

Plagioclase feldspar - caAl2si2O8

Explore this Geologic Timeline created by PBS: http://www.pbs.org/wgbh/evolution/change/deeptime/ Or this one from UC Berkeley: https://ucmp.berkeley.edu/help/timeform.php During which of these time intervals did modern humans appear?

Pleistocene

How would you describe the texture of this rock? How would you describe the composition of this rock? (hint: this rock contains primarily plagioclase feldspar, biotite and amphibole) What would the name for this rock be? Which of these options is the most likely interpretation of the cooling history of this rock?

Porphyritic Intermediate Andesite slow cooling within a magma chamber followed by rapid extrusive cooling

1.3 billion

Potassium-40 is radioactive and decays into Argon-40. The half-life of Potassium-40 is 1.3 billion years. You measure the # of atoms of each isotope in a rock and find 600 atoms of Potassium-40 and 600 atoms of Argon-40. How old is this rock?

Which of these Geologic time intervals was the longest and constituted almost 90% of Earth's History?

Precrambrian

Using the image shown below, how would you know which rock is older A or G? i.e. which of these relative dating principles would be most useful?

Principle of cross- cutting relationships

Using the image shown below, how would you know which rock is older G and F? i.e. which of these relative dating principles would be most useful?

Principle of superposition

What is the process of fixing, removing, or counteracting environmental problems associated with mining called?

Remediation

What type of faults would be required for the relative motion of the igneous and metamorphic rocks

Reverse

Stream offset by the san andreas fault

Right lateral strike slip fault

What type of fault created the offset in the road shown in the image below?

Right- lateral strike slip fault

What type of fault created the offset in the road shown in the image below? (can't see image)

Right- lateral strike slip fault

Which is the best description of an aquifer?

Rock or sediment below ground that accommodates the flow and storage of groundwater

What is the rock pictured above in the middle, labeled B?

Schist

what rock

Schist

What type of foliation does the rock below display?

Schistosity

Schistosity is a textural description of foiliation created by the parallel alignment of platy visible grains

Sedimentary rocks are classified according to what they are made of and what their texture is

Sedimentary rocks record info about the environment in which they are formed

Which formations in the figure is the most likely source rocks for oil and gas Which sites in the accompanying figure is the most likely setting for accumulation of an oil reservoir

Shales at 1, 3, and 5 Both limestone at 2 and sandstone at 4

How would you describe the scientific method?

Simple, linear process

decreased

Since the early 1980's, water use in the United States has _____________.

what rock?

Slate

What would be your hypothesis for where the boulder creek rock formed

Slow cooling at depth within the crust

Did the rock pictured below cool rapidly on Earth's surface or cool slowly within the crust?

Slowly within the crust

Which of these would be the most likely depositional environment for the sedimentary rock pictured below that contains rounded cobble, pebble and sand-sized clasts?

Steep river channel

In which of these environments would you expect to have high-pressure, low-temperature metamorphism?

Subduction zone

What happens as newly formed ocean crust moves away from the mid-ocean ridge?

The crust gets colder

Thicker than

The crust under the Rocky Mountains of Colorado and Wyoming is _____________ the crust under the regions to the east and west of the Rocky Mountains.

Metamorphic grade

The degree or intensity of metamorphism is known as _____________________.

How can you decide which radioactive isotope to use in dating a rock

The isotope needs to be present in the rock The half life needs to be long enough that there is still some left

How is the ore grade of a metal ore and the amount of waste material that is produced during mining and beneficiation related?

The lower the ore grade, the more waste material is created.

What is the cutt-off grade of an ore

The lowest grade of an ore that is profitable to mine

Which of the following statements is a quantitative observation (rather than a qualitative observation) about the Lyons Sandstone

The lyons is 220 feet thick

Which of the following statements is an interpretation about the Lyons Sandstone that we could make based on our interpretations.

The lyons was deposited in a desert sand dune environment

Groundwater flows from the interior of the island towards the coast line

The map below shows elevation of the water table in Long Island, NY. Which of these best describes the direction of groundwater flow? Groundwater flows from the interior of the island towards the coast line. Groundwater flows from east to west Groundwater flows from the coastline towards the interior of the island. Groundwater flows from north to south.

Towards the east

The map below shows elevation of the water table within the Dakota Aquifer in western Kansas. What is the general direction of groundwater flow?

The map below shows the annual water balance for different parts of Colorado. Which area would you predict is more heavily dependent on groundwater?

Marble

The metamorphic rock shown below is composed of medium-fine interlocking crystals that fizz when hydrochloric acid is dropped on them. What is this rock?

Quantitative and objective

The observation that a rock is made up of 40% quartz is best characterized as a _____________ and _____________ observation.

When a oceanic plate and a continental plate converge, which plate will subduct?

The oceanic plate

How does the price of a mineral resource usually respond when the supply of the mineral resource is reduced?

The price increases

Hydraulic gradient and hydraulic conductivity

The rate of groundwater flow is determined by the ______________ and _____________.

Viscosity refers to

The resistance to flow of a fluid

Limestone

The rock below fizzes when hydrochloric acid is dropped on it. What would this rock be called?

Biochemical

The rock below fizzes when hydrochloric acid is dropped on it. Which type of sedimentary rock is shown?

Chemical

The rock pictured below contains crystals of the mineral halite. It formed in a shallow evaporative sea. Which type of sedimentary rock would it be classified as?

Desert Sand Dune

The rock pictured below contains well-sorted, well-rounded, fine quartz sand, iron oxides and large cross-bedding. What is the most likely depositional environment for this rock?

Phyllite

The rock shown below contains fine-grained (too small to see with the naked eye) platy minerals such as mica. What would this rock be called?

Schistosity

The rock shown below contains large mica crystals and other platy minerals aligned in a parallel direction. What type of foliation does this rock display?

Dakota Group

The stratigraphic column below shows descriptions of the rock layers below Fort Collins. Of these options, which would be the best choice for a source of groundwater?

Which of the following statements about the half-life of a radioactive isotope is true?

The term half-life refers to the time it takes for half of the radioactive parent atoms to decay into daughter atoms

Which of these most accurately describes the relationship between China's export quota of REE and REE Price?

The two are inversely related; when the export quota is increased, the price decreases, and vice versa.

Rock A

The two rocks pictured below were both deposited next to or under the Cretaceous Interior Seaway, when a shallow sea covered much of the mid-section of North America. Rock A (top) fizzes with hydrochloric acid and contains clam fossils. Rock B (bottom) contains sand-sized fragments of quartz. Which one would you predict was deposited in deeper water?

The type and characteristics of a metamorphic rock reflect the temperature and pressure conditions that it was exposed to.

The discharge of a river measures

The volume of water flowing through a river

An accepted scientific idea that explains a process based on the best available information

Theory

Why is Earth's climate sensitivity difficult to calculate precisely?

There are a variety of feedbacks that operate on different timescales

What must have happened at some time after the igneous and metamorphic rocks formed

They became uplifted relative to the surrounding rocks

Which of these events occurred last

Tilting and uplift of both the muddy gray sandstone and the reddish sandstone

On the map below the brown lines indicate surface elevations and the blue lines show the elevations of the water table. In what general direction would you expect the groundwater to flow? On the map below the brown lines indicate surface elevations and the blue lines show the elevations of the water table. What best explains the location of lakes in this region?

Toward the bottom right of the map Lakes occur where the water table intersects the land surface

Generally, which direction is the pacific plate moving

Toward the northwest

Which general direction would groundwater flow

Toward the southeast

This Google Earth image shows the plate boundaries surrounding the Nazca Plate. In what general direction is the Nazca Plate moving?

Towards the East

In this Google Earth image the plate boundaries surrounding the Cocos Plate are shown. What is the general direction the Cocos Plate is moving?

Towards the northeast

What is the term used for a boundary between two plates where the relative motion is horizontal, with the two plates sliding past one another?

Transform

Concentrated deposits of Uranium ore are created by

Transport and precipitation of uranium by ground water

Trenches that form at subduction zones are the deepest parts of the ocean

What type of cleavage would you expect to find in proxene

Two directions

What type of structures can be seen in the image below?

Two normal faults

Areas at the greatest risk of collapsible soils tend to be

Underlain by dry, loose sediments that accumulate in valleys

Which of these is not a necessary step in the formation of oil and natural gas

Uplift and erosion of organic rich rocks

G, C, A, F, B, H, D, I, and E.

Using the image shown below and your relative dating principles, put the rocks and faults in the order that they formed from oldest (first - 1) to youngest (last - 9).

Principle of cross-cutting relationships

Using the image shown below, how would you know which rock is older A or G? i.e. which of these relative dating principles would be most useful?

Based on the map below, which of these hazards from Mt. Rainier would you be most concerned about if you lived in Tacoma?

Volcanic mudflows

Uranium 238 has a half life of 4.5 billion years. It would be most useful to date

Volcanic rocks that formed 1 billion years ago

Volcano 2

Volcano 1 is cone shaped and composed of a composite of andesite, ash layers, mudflow layers, and volcanic debris layers. Volcano 2 is broad and low-slope and composed of basalt. Which volcano would you be most concerned about low viscosity lava flows?

Volcano 2

Conditions would promote soil development

Warmer climate Wetter climate Flatter topography

Increasing the stress on existing faults

Wastewater injection wells may increase the seismic risk for an area by _______________.

Read this article about a swarm of earthquakes at Yellowstone in 2017 https://volcanoes.usgs.gov/volcanoes/yellowstone/article_home.html?vaid=124 What was the most likely cause of this seismic swarm?

Water is diffusing through small cracks in the subsurface

We can determine the numerical age of certain geologic features and events using the decay of radioactive isotopes

We can work out the relative ages of geologic features and events by examining the relationships between them.

Which materials would you predict groundwater to flow fastest through

Well sorted sand

Which of the following would likely have the highest porosity?

Well-sorted gravel

Cache la powder river and Horsetooth reservoir

What are the two primary water sources for the City of Fort Collins?

a gap in the sequence of rocks

What does an unconformity represent in the geologic record?

The flow of a current air or water in one direction

What does cross-bedding, such as shown in the image below, indicate about the environment in which the sand was deposited?

Natural gas

What fossil fuel produces the least amount of carbon dioxide emissions and other air pollutants for a given amount of energy produced?

4.56 billion years

What is the currently recognized age of the Earth, based on the radiometric dating of meterorites?

Diorite

What is the igneous rock shown below?

What is the minimum number of seismic stations needed to locate an earthquake?

igneous

What type of rock is shown in the image below?

Metamorphic

What type of rock is shown in the image of an outcrop below?

Sedimentary

What type of rock is shown in the image of the landscape below?

Compression

What type of stress would have caused the structures seen in this image below?

monocline

What type of structure can be seen in the image below?

normal fault

What type of structure is shown in the image below?

Angular unconformity

What type of unconformity is shown in the image below?

Gneiss

What would the metamorphic rock shown below be called?

Conglomerate

What would the rock below be called?

When rocks are subjected to high heat and stress they may become altered and deformed.

When rocks are subjected to high heat and/or stress they may become altered and deformed.

Which graph below best represents the change in the proportion of unstable (parent) radioactive isotopes with time?

Feldspar and quartz

Which minerals are composed of a 3-dimensional framework of silicate tetrahedron?

A, C, and D.

Which of the following are possible impacts of over-pumping groundwater? (select all that apply) A) shallow wells become dry B) rising water table C) declining water table D) ground subsidence

A, B, C, and E.

Which of the following can cause an increase in the precipitation of minerals from an aqueous solution? (Select all that apply.) A) Changing Oxygen Levels B) Changing Pressure C) Evaporating Water D) Heating a fluid E) Cooling a fluid

B, C, and F.

Which of the following changes to the crust would act to decrease regional elevations? (Choose all that apply.) A) Heat the crust B) Cool the crust C) Thin the crust D) Decrease the density of the crust E) Thicken the crust F) Increase the density of the crust

Which of the following formulas represents an sulfate A) Fe2O3 B) FeS2 C) KAlSi3O8 D) CaSO4 · 2H2O

D and F

Which of the following geologic phenomena would not be examples of uniformitarianism? SELECT TWO A) Rounded pebbles in conglomerates formed liked rounded pebbles today B) Landslides typically occur where they have in the past C) Ophiolites are parts of the ocean floor brought to the surface D) Diamonds come from strange, deep volcanoes that do not erupt any longer E) When sea levels are high, marine rocks form on continents F) Banded iron formed as oxygen entered the atmosphere

Steep river channel

Which of the following is the most likely depositional environment for the rock pictured below?

Centimeters per year

Which of the following is the typical rate of tectonic plate motion?

A, D, E, F, and H.

Which of the following would be useful data for assessing the earthquake hazard for an area? (select all that apply) A) location and magnitude of past earthquakes B) population density of the area C) types of buildings in the area D) location and type of plate boundaries E) rock/soil type of the area F) location of faults G) location of major highways and airports H) location of active volcanoes

Well sorted sand

Which of the following would likely have the highest permeability? poorly-sorted silt, sand, and gravel well-cemented sandstone well-sorted sand unfractured granite

Precambrian

Which of these Geologic time intervals was the longest and constituted almost 90% of Earth's History?

B, C, and E.

Which of these are examples of chemical weathering? (select all that apply) A) Frost Wedging B) Dissolution C) Oxidation D) Exfoliation E) Hydrolysis

A and C

Which of these characteristics of a drainage basin would tend to promote a shorter lag time between a rainfall event and peak discharge? (choose all that apply) A) Steeper Topography B) Thicker Soils C) More paved surfaces D) More vegetation E) Larger drainage basin

A, B, C, and H.

Which of these drainage basins does Fort Collins reside in? (Choose all that apply.) A) South Platte River B) Missouri River C) Mississippi River D) Arkansas River E) Big Thompson F) River G) Colorado River H) Cache la Poudre

A, C, E, and F.

Which of these energy sources can generally produce electricity "on-demand"? (select all that apply) A) Nuclear B) Solar C) Natural Gas D) Wind E) Coal F) Hydroelectric

Natural gas and Coal

Which of these energy sources produce carbon dioxide as a waste during electricity production (excluding emissions resulting from manufacturing of equipment)? (select all that apply) Wind Nuclear Hydroelectric Natural Gas Solar Coal

Hydroelectric, wind, and solar.

Which of these energy sources would be considered renewable? (select all that apply) Hydroelectric Wind Natural Gas Coal Solar Nuclear

A, C, D, and E.

Which of these features would you expect to find at a convergent boundary where subduction is taking place? (select all that apply) A) volcanoes B) new ocean crust C) shallow earthquakes D) deep earthquakes E) deep ocean trench

B, D, and F

Which of these features would you expect to find at a divergent boundary? (select all that apply) A) deep ocean trench B) ridge of elevated seafloor C) accretionary prism D) deep earthquakes E) shallow earthquakes F) volcanoes

Wind

Which of these fuel sources are currently the least expensive to build and operate in Larimer County, Colorado, according to the "levelized cost of energy (LCOE)"? Natural Gas Nuclear Wind Solar Coal

Beach environment influenced by waves

Which of these is the LEAST likely depositional environment for the rock composed of clay-sized casts pictured below?

Irrigation

Which of these is the largest use of water in Colorado?

Mafic

Which of these magma compositions tend to be the least explosive?

bedload

Which of these move by bouncing or rolling along by the force of the river flow?

A, C, D, and F.

Which of these river variables typically increase as you travel downstream from the headwaters to the mouth? (select all that apply) A) Velocity B) Channel Gradient C) Discharge D) Sediment Load E) Maximum sediment grain size F) Channel Size

Shale deposited in an inland sea environment

Which of these rocks and depositional environments is the most likely source for oil and/or natural gas? siltstone deposited in a floodplain environment sandstone deposited in a desert sand dune environment shale deposited in an inland sea environment conglomerate deposited in a mountainous river environment sandstone deposited in a beach environment

B and D

Which of these rocks could be the parent rock of gneiss? (select all that apply) A) Limestone B) Granite C) Quartz Sandstone D) Mudrock (Such as shale)

B and D

Which of these statements about the Fort Collins area would be considered an observation, not an interpretation? (select all that apply) A) The Fort Collins area was once covered by a shallow sea B) There is a river that flows toward the southeast through Fort Collins C) The mountains to west of Fort Collins were formed by the collision of tectonic plates D) The area to the west of Fort Collins has steeper topography than to the east

Subduction zones

Which of these tectonic settings tend to produce the largest earthquakes?

phaneritic

Which of these terms would best describe the texture of the rock below?

B, E, and F.

Which of these variables contribute to the Moment Magnitude of an earthquake? (Select all that apply.) A) The depth of the hypocenter of the earthquake B) The rigidity of the rock that contains the fault C) The degree of water saturation of the soil D) The distance a town is from the epicenter E) The distance that the fault slips during the earthquake F) The area of the fault that ruptures

A, B, and C.

Which of these variables contribute to the Moment Magnitude of an earthquake? (Select all that apply.) A) The rigidity of the rock that contains the fault B) The distance that the fault slips during the earthquake C) The area of the fault that ruptures D) The distance a town is from the epicenter E) The depth of the hypocenter of the earthquake F) The degree of water saturation of the soil

Village 1

Which of these villages would be safest from?

A and B

Which of these would be chemical formulas of felsic silicate minerals? (select all that apply) A)KAl3Si3O10 (OH)2 B) NaAlSi3O8 C) Fe2SiO4 D) (Ca,Na)(Mg,Fe,Al)SiO6 E) MgCO3

D and E

Which of these would be chemical formulas of mafic silicate minerals? (select all that apply) A) NaAlSi3O8 B) MgCO3 C) KAl3Si3O10(OH)2 D) (Ca,Na)(Mg,Fe,Al)Si2O6 E) Fe2SiO4

regional metamorphism

Which of type of metamorphism would you most expect to have at a continental collision?

Intensity Scale

Which scale would you use if you wanted to measure the amount of shaking that occurred in specific areas as a result of an earthquake?

Rayleigh wave

Which seismic wave is shown in the diagram below?

Which site on the cross section below is the most likely setting for an oil field (large accumulation of oil)?

Subduction Zones

Which tectonic setting tends to produce the largest earthquakes?

Clastic

Which type of sedimentary rock is shown below?

P-Wave

Which type of seismic wave is shown in the diagram below?

Are rare earth elements (REE) currently being mined in the United States?

Yes, there is one operational mine in California.

Are rare earth elements currently being mined in the United States?

Yes, there is one operational mine in California.

Continental collision

You are exploring an area and find many reverse faults, synclines and anticlines. Which of these tectonic settings would you hypothesize caused the deformation you see?

swamp plants

_________ is the starting material for coal

Porosity

______________ describes the volume of open space in a rock or sediment.

Which of these measurements will vary for a given earthquake depending on how far away from the epicenter you are

`intensity

What is the initial cause of melting at a subduction zone

a Sedimentary rocks made from products of chemical and physical weathering (the break down of other rocks)

What type of structure can be seen in the image below?

anticline

Which of the following would likely have the lowest permeability?

clay

Which energy source currently produces the most electricity in Colorado

coal

Which energy source currently produces the most electricity in Colorado?

coal

A composite (stratovolcano) volcano has steep flanks, symmetrical cone shapes, distinct craters, and a silica-rich magma that results in an explosive eruption style.

composite (stratovolcano)

What type of stress would have caused the deformation that we see in the rockies

compression

The sedimentary rock in the image below contains sand, pebbles and cobbles that are partially rounded. What would this rock be called?

conglomerate

Contact metamorphism takes place where a body of magma intrudes into the upper part of the crust.

contact

At which type of plate boundary would you predict most folding to occur

convergent

Extrusive igneous rocks

cools quickly and as a result these rocks are fine grained or has lack of crystal growth

3 main way that minerals form are

crystallization from magma, precipitation from aqueous solution, and precipitation from organisms

3 ways minerals form

crystallization from magma, precipitation from aqueous solution, and precipitation from organisms

Sand, gravel, and larger fragments that flows rapidly would be classified as a debris flow

debris flow

If the amount of incoming solar radiation that the Earth absorbs is less than the amount of outgoing radiation the Earth emits to space, Earth's temperature will

decrease

If the size of ice sheets on land decreases (less water locked up as ice), the 18O/16O ratio of seawater should decrease

decrease

Since the early 1980's, water use in the united states has DECREASED

decreased

divergent

What type of plate boundary is at the location indicated by the arrow, between the Nazca plate and the pacific plate

divergent

Folds are an example of DUCTILE deformation that occur at DEEP depths in the crust.

ductile and deep

Which sector of the economy produces the most anthropogenic greenhouse gas emissions?

electricity and heat production

Increase the density of the block

elevation will decrease

Increase the block thickness

elevation will increase

Is the atlantic ocean currently expanding or shrinking

expanding

extrusive/ volcanic

Recent changes in atmospheric CO2 and temperature are faster than previous changes that we know about in the geologic record

faster

An igneous rock with which of these compositions would melt first as the rock is being heated

felsic

Volcanoes with which magma composition tend to have the most explosive eruptions?

felsic

Alignment of minerals or other features in the direction perpendicular to the main stress is called foiliation.

foliation

Which of these surfaces would you predict has the highest albedo

fresh snow

Adding water to materials on a slope can reduce friction and cause mass movements to occur.

friction

The map below show contours of the elevation of the water table in the Merced Groundwater Basin in California. What general direction would you expect the groundwater to flow under Merced, CA?

from east to west

The map below show contours of the elevation of the water table in the Merced Groundwater Basin in California. What general direction would you expect the groundwater to flow under Merced, CA? (can't see)

from east to west

The contour lines on the map below show the elevations of the water table for a section of the High Plains Aquifer. In what general direction would you expect the groundwater to flow

from northwest to southeast

Mass wasting occurs when the shear force is greater than the normal force.

greater than

Mass wasting occurs when the shear force is greater than the shear strength.

greater than

Increase regional elevation

heat the crust/ mantle, shorten/ thicken crust, add surface material, add magma at depth

The three agents of metamorphism are heat, pressure, and fluids

heat, pressure, and fluids

Melting of rocks

heating, release of pressure, addition of water, or some combination of the 3

If a region has extensive normal faulting, would you expect that region to have high regional elevation, high relief, or both?

high relief

Larger clast sizes in a sedimentary rock generally indicate higher energy levels in the environment in which the sediment was deposited

higher

The concentration of a mineral resource in an ore deposit is generally HIGHER than the average concentration in Earth's continental crust.

higher

The rate of groundwater flow is determined by the hydraulic conductivity and hydraulic gradient.

hydraulic conductivity and hydraulic gradient.

If you wanted to reconstruct atmospheric temperatures on long timescales (hundreds of thousands of years), which of these archives would be the best target?

ice cores

If you wanted to reconstruct temperatures in the atmosphere on timescales of thousands of years on land, which of these archives would you target

ice cores

Seal

impermeable rock that prevents migration of oil or gas

Earth's energy balance refers to the balance between incoming radiation from the sun and radiation emitted by the Earth to space

incoming radiation radiation emitted by the earth to space

A decrease in Earth's average albedo would lead to a increase in Earth's average temperature.

increase

An increase in the amount of sea ice that covers the ocean would lead to a increase in albedo.

increase

Large volcanic eruptions send tiny particles (aerosols) into the upper atmosphere. These aerosols cause a(n) increase in Earth's albedo, leading to less incoming solar radiation being absorbed by the Earth and a decrease in Earth's temperature

increase less decrease

The shear force acting on materials on a slope

increases as the slope angle increases.

index fossils

Which of these sectors uses the most water in Colorado?

irrigation

Felsic (non-ferromagnesian)

light in color

The rock pictured below, which can be found near Fort Collins, fizzes when hydrochloric acid is dropped on it and contains clam fossils. What would this sedimentary rock be called?

limestone

Which of these is generally not a clastic sedimentary rock

limestone

In the diagram to the right, which layer is the lithosphere? In the diagram to the right, which layer is the Mantle?

lithospheric = D Mantle = A

Which of these is the comparison and correlation of strata within a region by examining the physical properties of the rock and its sequence with other strata.

lithostratigraphic correlation

Gases escape more easily from a low viscosity magma; that is why eruptions are more violent from volcanoes that are supplied by high viscosity magma.

low high

Smaller clast sizes in a sedimentary rock generally indicate lower energy levels in the environment in which the sediment was deposited

lower

Smaller clast sizes in a sedimentary rock generally indicate lower energy levels in the environment in which the sediment was deposited?

lower

Water vapor will have a lower 18O/16O ratio than the seawater it evaporated from.

lower

Pyroxene has the chemical formula, (NaCa)(Mg,Fe,Al)(Al,Si)2O6. Is pyroxene a felsic or mafic silicate mineral?

mafic

Types of magma expect in Hawaii

mafic

Which of these magma compositions would you expect to flow most quickly?

mafic

Which of these layers melts to produce the first magma in a subduction zone?

mantle

Chemical sedimentary rocks are composed of

material that has been transported as ions in solution

The degree or intensity of metamorphism is known as

metamorphic grade

What type of structure

monocline

As Earth's temperature increases, the Earth emits more radiation

As sediment is transported it usually becomes more rounded, better sorted, and smaller grain size

more better smaller

If you partially melt a rock, the magma that is produces will be more felsic in composition than the original rock

more felsic

A decrease in Earth's average albedo would lead to more incoming solar radiation being absorbed by Earth

more incoming solar radiation being absorbed by Earth

What might an increasing number of shallow earthquakes under a volcano indicate?

movement of magma towards the surface

Which of these fossil fuels are produced at a greater depth of burial?

natural gas

Which of these fossil fuels produces the least amount of carbon dioxide emissions and other air pollutants for a given amount of energy produced?

natural gas

Over the past decade, use of NATURAL GAS to generate electricity has been increasing in Colorado, and use of COAL has been decreasing.

natural gas coal

What generally happens when two continental plates converge?

neither subducts, they slam together in a collision

Isotopes are atoms of the same element but have different numbers of NEUTRONS

neutrons

When an increase in global temperature is caused by increased greenhouse gas concentrations, would you expect daytime temperatures or nighttime temperatures to increase faster?

nighttime

Is this metamorphic rock foliated?

The numbers on this figure represent the elevation of the water table in feet above sea level. If you lived in the house depicted on the map, would contamination from a leaking gas tank a the gas station flow towards your house?

Precipitation that falls as snow in cold regions, should have a no answer text provided 18O/16O ratio than seawater.

no answer text provided

Go to the USGS Volcano Hazards Page: http://volcanoes.usgs.gov/index.html What is the current Alert Level of the Kilauea Volcano?

normal

Go to the USGS Volcano Hazards Page: http://volcanoes.usgs.gov/index.html What is the current Alert Level of the Yellowstone Volcano?

normal

What type of fault would occur as a result of tension stress?

normal

What type of fault would you predict to find at a divergent plate boundary

normal

Sangre de cristo fault san luis valley

normal fault

Death Valley is a region that has very low elevation but has mountains with high relief. What type of faults would you predict created the relief in Death Valley?

normal faults

What is the orientation of the stress (what direction did it come from)

north south

Nuclear energy

not a fossil fuel and not renewable

As you move away from a mid-ocean ridge on either side the age of the ocean crust should get ?

older

Source Rock

organic matter-bearing rock within which the formation of oil and gas takes place

Magnetite has the chemical formula, Fe3O4. Which class of minerals would magnetite be placed

oxides

Which of these seismic waves travel through compression (like the compression of the coils of a spring, similar to the way sound travels)?

p waves

Which of these seismic waves would you expect to arrive at a seismic station first?

p waves

Albedo is defined as the percentage of incoming solar radiation that is reflected back to space

percentage of incoming solar radiation that is reflected back to space

Hydraulic fracturing is used to increase the PERMEABILITY of an oil or gas-bearing rock.

permeability

PERMEABILITY describes how well connected the pore spaces in a rock or sediment are.

permeability

Permeability describes how well connected the pore spaces in a rock or sediment are.

permeability

Which of these terms would best describe the texture of the igneous rock pictured right? The rock pictured to the right contains biotite, amphibole and plagioclase feldspar. How would you classify its composition? What would the rock pictured to right be called?

phaneritic Intermediate Diorite

How would you describe the texture of this rock? How would you describe the composition of this rock? What would the name for this rock be?

phaneritic felsic Granite

Coal was formed through the burial and heating of PLANTS

plants

plate A is subducting

plate B is subjecting

Porosity describes the percentage of open space within sediment or rock

porosity

The loss of sea ice in the Arctic is an example of a positive feedback, where an initial warming will cause there to be less sea ice which will decrease the albedo and lead to additional warming.

positive feedback additional warming

Using the image shown below, how would you know which rock is older B or F? i.e. which of these relative dating principles would be most useful?

principle of superposition

Which of these is considered the biggest hurdle in the path of REE production?

processing REE ore

Which of these minerals is most resistant to weathering (it breaks down the slowest at the surface)?

quartz

The metamorphic rock shown below started as sandstone before it was metamorphosed. It is very hard and does not fizz under hydrochloric acid. What is this rock?

quartzite

What is the process of fixing, removing, or counteracting environmental problems associated with mining called?

remediation

What type of structure

reverse

What type of fault would you predict to find at a convergent plate boundary

reverse fault

The hanging wall is on the RIGHT side of this fault.

right

The hanging wall is on the right side of this fault. What type of fault is shown What type of stress would cause the fault>

right normal tension

Which type of mass wasting moves rapidly and can be deadly? (choose all that apply)

rock fall flows

Isotope

same element, different number of neutrons

Which site on the cross section below is the most likely setting for an oil field (large accumulation of oil)?

sandstone at D

If you wanted to reconstruct ocean temperatures on long timescales (hundreds of thousands of years), which of these archives would be the best target?

sediment cores

Which of the following settings would be most favorable for fossil fuels?

sedimentary rocks that contain folds and faults

The rock pictured below contains clay-sized clasts of clay minerals. What would this rock be called?

shale

Which of these sedimentary rocks contains clasts that are clay-sized?

shale

The rock pictured to the right contains clay- sized clasts, what would this rock be called? Which of these would be the most likely depositional environment for the rock pictured to the right?

shale deeper ocean away from shore

It is thought that the formation of the Rocky Mountains was caused by the subduction of an ocean plate at a SHALLOWER angle than typical subduction.

shallower

A thick deposit of unconsolidated sediment that slowly move as a unit along a curved surface would be classified as a slump

slump

Stres is the force exerted per unit area and strain is the physical change that results in response to that force.

stress and strain

Which type of fault would you expect to find at a transform boundary?

strike slip fault

Decrease regional elevation

structurally thin crust, erode material, cool crust or mantle

Trap

structure or arrangement of rocks that leads to the accumulation of oil or gas

High Pressure/Low Temperature metamorphism is typically found at which tectonic environment?

subduction zone

In which of these environments would you expect to have high-pressure, low-temperature metamorphism?

subduction zone

Which class of minerals would barite (BaSO4) go in

sulfates

Molybdenite has the chemical formula, MoS2. Which class of minerals would molybdenite be placed?

sulfides

The largest mines, producing the most ore, are generally

surfacce mining

In the figure, which of the following shows an angular unconformity?

surface B

The largest mines, producing the most ore, are generally SURFACE MINES

surface mines

Which of these types of mining typically produces a greater disturbance of the land and a larger amount of waste rock?

surface mining

What is the geological structure shown in this image called?

syncline

What type of fold is this

syncline

What type of stress would cause the fault pictured below?

tension

Half-life

the lifetime of half the radioactive isotopes in a system

How does the price of a mineral resource usually respond when the supply of the mineral resource is reduced?

the price increases

Cleavage describes the way a mineral breaks along preferred directions

the way a mineral breaks along preferred directions

An earthquake occurs when

there is a rupture and movement along a fault

Reverse faulting will tend to THICKEN the crust

thicken

A greenhouse gas is an atmospheric gas that traps heat radiating from the surface of Earth

traps heat radiating from the surface of Earth

The hanging wall block moves up relative to the footwall block in reverse dip-slip faults.

true

How is nuclear energy produced to generate electricity?

uranium is split into two smaller particles, releasing heat in the process

Volcanoes occur on the overriding (subducting plate)

volcanoes- overriding

Soils develop faster under warmer conditions

warmer

Liquefaction occurs when water- saturated sediments are shaken

water- saturated sediments are shaken

Which of these energy sources is currently the least expensive source of electricity in Larimer County (the county containing Fort Collins) according to the levelized cost of energy?

wind

Which of these energy sources is currently the least expensive source of electricity in Larimer County (the county containing Fort Collins)?

wind

Which of these fuel sources are currently the least expensive to build and operate in Larimer County, according to the "levelized cost of energy (LCOE)"?

wind

What is the Principle of Superposition?

younger sedimentary rock layers are deposited on top of older sedimentary rock layers

geo 120 :(

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