Geology

Which of the following describes sediment deposition in alluvial fans?

It is where the slope of the stream decreases and the water slows.

A birthdate is an example of a(n) ________ age.

numerical

What type of age does the measurement of parent and daughter isotopes in a mineral determine?

numerical age

Which of the following is true of the Earth's glacial history?

There was a time called Snowball Earth when the Earth's surface was almost entirely covered in glacial ice.

The Great Basin deserts found in the western United States are primarily the result of being located ________.

With the rain shadow of one or more mountain ranges

Over time, alluvial fans may merge to form a ________.

bajada

To qualify as a desert, a region must ________.

be arid, with less than 15 percent of the ground surface vegetated

Explosive or voluminous eruptions may cause a volcano to subside or collapse into the now-empty magma chamber, producing a broad depression termed a ________.

crater

Rhyolite lavas ________.

do not flow as far from the vent as basaltic lavas do

How much of a radioactive parent isotope will remain after three half-lives have passed?

one-eighth

How is the half-life of a radioactive parent isotope defined

the time it takes for half of the parent isotope to decay

The pillow basalts most likely formed ____________.

underwater at a mid-ocean ridge

__________ is when multiples normal faults converge or are cut off along a single, gently dipping fault surface.

Detachment fault

Desert climates associated with a rain shadow are found ________.

On the leeward side of mountain ranges

Collisions of continental crust blocks and fragments during the Proterozoic led to the formation of a single supercontinent called

Rodinia.

Which province is most likely to have desert landforms?

Sierra Nevada

Extensional tectonics has occurred in or is characteristic of the following, except:

Subduction zones

Two atoms of a single element that differ in number of neutrons are said to represent two distinct ________ of that element.

isotopes

Volcanic bombs are ________.

large pyroclastic fragments that acquire streamlined, polished surfaces in flight

Hot spot volcanoes are associated with which geologic feature?

mantle plumes