To explain the great volumes of granite plutonic rocks, most geologists think that partial melting of the _______ must take place.
A) core
B) lower mantle
C) lower continental crust
D) oceanic crust
E) asthenosphere

Question

Quizplus · Accepted Answer

The lower continental crust, which is made up of granitic rocks, is the most likely source for the partial melting that produces granite plutonic rocks. The core, lower mantle, oceanic crust, and asthenosphere are not typically associated with the formation of granite plutonic rocks.

To Explain the Great Volumes of Granite Plutonic Rocks, Most