A surface of erosion on metamorphic or igneous rocks below sedimentary rocks is a(n):
a. nonconformity.
b. disconformity.
c. angular unconformity.
d. anticonformity.
e. none of the above
A
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Spreading centers occur along
A. transform faults. B. midocean ridges. C. the northern and western margins of the Juan de Fuca plate. D. trenches.
Convergent boundaries are areas of
A. tensional forces that stretch the crust and generate a spreading center. B. plate collision. C. compressional forces that crunch the crust and generate a spreading center. D. crustal formation.
At higher altitudes, water will boil at a lower temperature than required at sea level
Indicate whether the statement is true or false
Which of the following is NOT a type of evidence left behind by glaciers?
A. scattered stones (dropstones) in fine-grained sediment B. changes in the isotopic compositions of marine shells C. scratched and polished bedrock D. V-shaped valleys E. All of these are evidence left behind by glaciers.