Which four states account for 91% of all U.S. earthquakes of magnitude 3.5 and above?

A. California, Hawaii, Washington, and Nevada
B. California, Montana, Washington, and Hawaii
C. California, Alaska, Hawaii, and Nevada
D. California, Iowa, Nevada, and Idaho
E. California, Alaska, Washington, and Oregon


Answer: C

Environmental & Atmospheric Sciences

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causes ____________________ metamorphism. Fill in the blank(s) with the appropriate word(s).

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During the last two million years, there have been at least ____________________ warm-cold cycles. Fill in the blank(s) with the appropriate word(s)

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What is NOT true regarding transform boundaries?

A. Tectonic plates slip past each other laterally. B. Movement occurs along great vertical fractures. C. They neither create new crust nor destroy old crust. D. They’re associated with very little seismic activity. E. They mostly coincide with midocean ridge systems.

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The major ________ classification of metamorphic rocks divides them into foliated and non-foliated groups.

A. fabric B. crystal size C. mineral D. textural E. genetic

Environmental & Atmospheric Sciences