Which of the following igneous rocks is thought to be common in the Earth's mantle but rare in the crust?
A)pumice
B)granite
C)pegmatite
D)peridotite

Question

Quizplus · Accepted Answer

Peridotite is a type of ultramafic rock that is thought to make up a significant portion of the Earth's mantle, but it is rare in the crust. Pumice is a volcanic rock that is common on the Earth's surface but not necessarily in the mantle. Granite and pegmatite are both igneous rocks that are more commonly found in the Earth's continental crust.

Which of the Following Igneous Rocks Is Thought to Be