What is the composition of continental crust?

• A. Dense mafic rock
• B. Felsic rock
• C. Granite
• D. Liquid rock

Answer: (B)

The composition of continental crust is primarily characterized by felsic rock. Felsic rocks are rich in silica and feldspar and typically have a lighter color compared to mafic rocks, which are denser and darker. The continental crust is composed mainly of granitic types of rocks, which fall under the broader classification of felsic minerals. These rocks are less dense than the basaltic rocks that primarily form the oceanic crust.

Felsic rocks such as granite are significant components of the continental crust, contributing to its thickness and buoyancy. Unlike liquid rock, which refers to magma or molten material found beneath the earth's surface, and dense mafic rock, which is not the dominant composition of the continental crust, felsic rocks play a crucial role in its structure and formation. Hence, the classification as felsic accurately reflects the composition of the continental crust.