001- Landforms Lab 1
The GPS station BURI is moving at a rate of
13.69 mm/yr
The GPS station NRIL is moving at a rate of
22.25 mm/yr
The GPS station MALI is moving at a rate of
31.19 mm/yr
According to the diagram shown below, found also in your lab manual on page 61, how many magnetic reversals has the Earth undergone within the past 8 million years?
33
GPS data can be used to track the rate and direction of plate movement. If a GPS unit measures a latitude velocity of 28.2 mm/yr and a longitude velocity of 59 mm/yr, what is the velocity of plate motion?
65.4 mm/yr
The GPS station HNLC is moving at a rate of
71.53 mm/yr
At transform boundaries, the rate of __________ plate motion is measured in mm/year by GPS stations attached to bedrock.
Absolute
Australia is composed of relatively old and thick ___
Continental Crust
Warmer material rises as cooler material sinks. This process is called
Convection Cycling
A trench indicates the location of a ___ boundary.
Convergent
The lithosphere is destroyed at ___ boundaries.
Convergent
The warmest and least dense rocks (represented by the reds on Figure 2.6) are generally found along ___
Convergent, Divergent, and Transform Boundaries
A pattern of earthquakes that are shallow at the plate boundary and get progressively deeper are evidence of a _____ plate boundary. An example of this is found in __________.
Convergent; Western South America
As you move farther away from the locality marked A towards the locality marked B, you come across increasingly:
Cooler, Descending Material; Cooler, Denser Material
Of the three earthquake depths, ___ earthquakes occur the farthest laterally from the trench at the Earth's surface.
Deep-Focus
A mid-ocean ridge occurs at a ___ boundary.
Divergent
New lithosphere is created at ___ boundaries.
Divergent
Subduction occurs neither at transform boundaries nor at ___ boundaries.
Divergent
The polarity of the Earth's magnetic field at any given time is recorded in rock material only at __________ plate boundaries.
Divergent
What kind of tectonic boundary would be evidenced by down-dropped blocks of rock and shallow-focused earthquakes?
Divergent Boundary
The earthquakes that occur in Southern California generally occur along a ___
Fault
You are visiting Key West, Florida. Which tectonic plate are you on, and what is the nearest adjacent plate?
North American Plate; Caribbean Plate
What side do the triangles lie on?
The Overlying Plate
Lithosphere is neither created nor destroyed at ___ boundaries.
Transform
___ boundaries often cut across and offset segments of divergent boundaries.
Transform
Which of the following evidence does NOT support plate tectonics?
Presence of Magnetic Field
_____ plate motion describes the displacement of two plates at a transform plate boundary.
Relative
___ found in the Atlantic Ocean between North America and Europe is composed of dense and relatively young rock.
Seafloor Crust
The slowly increasing distance between South America and Africa is due to ___
Seafloor Spreading
Layered ___ exposed by erosion can be seen when looking at the Grand Canyon in the United States.
Sedimentary Rock
Only ___ earthquakes occur along divergent plate boundaries.
Shallow-Focus
___ earthquakes are the earthquakes with the deepest foci possible along a transform fault boundary.
Shallow-Focus
The extremely deep ocean Marianas Trench is a result of ___
Subduction
The foci of deep-focus earthquakes and ___ earthquakes are always exclusively located on the subducting plate at a convergent boundary.
Intermediate-Focus
Old Faithful Geyser at Yellowstone National Park in the United States acquires its energy from a ___
Hot Spot
Please select all of the correct statements below regarding hot spots
In a volcano chain, the volcano farthest from the hot spot is the oldest. The hot spot stays stationary while the lithospheric plate moves over it. A hot spot will often have an active volcano directly over it.
