First motion studies of mid-ocean ridges show that the faults there are ________, and parallel to the rift valley.
A. deep focus earthquakes
B. compression
C. strike-slip motion
D. normal
E. subduction
Answer: D
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What will be an ideal response?
Which of the following processes causes the warm temperatures of a heat burst?
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Which of the following letters best represents a location where sinking air in a Walker cell is most typical?
A) A
B) B
C) C
D) D
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