GEOLOGY 101 Exam 2 Texas A&M questions with correct answers

Lahar CORRECT ANSWER mudflow originating from a volcanic slope, also called mass wasting events What is a geological example of both a hot spot AND divergent plate boundary location? CORRECT ANSWER Iceland Where is magma generated? CORRECT ANSWER Uppermost mantle Where is the greatest amount of magma created? CORRECT ANSWER At divergent plate boundaries. A lesser amount is formed at subduction zones. It can also be formed when crustal rocks melt. Geothermal Gradient CORRECT ANSWER When the temperature of in the upper crust increases about 25 degrees celsius per kilometer What can cause rock to melt at lower temperatures? CORRECT ANSWER Water and other volatiles Bowen's Reaction Series CORRECT ANSWER Minerals crystallize in a systematic fashion based on their melting points. What is the first mineral to crystallize? CORRECT ANSWER Olivine At what point of a melt will there be very little iron, magnesium, and calcium? CORRECT ANSWER When 1/3 of a magma h