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ConcepTest: Cooling History of Magma #2

ConcepTest questions by David McConnell , David Steer , Walter Borowski, Jeffrey Dick, Annabelle Foos, Jeffrey Knott, Alvin Konigsberg, Michelle Malone, Heidi McGrew, Kathie Owens, and Stephen Van Horn

Question:

The lines shown on the idealized graph below illustrate the cooling histories for the four magmas listed below, i.e., the lines illustrate how magma temperature decreased with time. What rock is best represented by cooling history B?

a. andesite porphyry
b. gabbro
c. basalt
d. obsidian

Cooling History of Magmas

Student Responses:

No data yet. The correct response is C.

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