The average composition of the oceanic crust is thought to approximate that of .
A)granite
B)peridotite
C)basalt
D)iron

Question

Quizplus · Accepted Answer

The oceanic crust is predominantly composed of basalt, which is an igneous rock formed from the solidification of magma that has a relatively low silica content. The composition of basalt is different from that of granite, which is a type of volcanic rock with a higher silica content. Peridotite is a type of ultramafic rock that is found in the earth's mantle, and is not a major component of the oceanic crust. Iron is a mineral that can be found in the oceanic crust, but it is not the predominant component.

The Average Composition of the Oceanic Crust Is Thought to Approximate