Igneous rocks are overwhelmingly composed of silicate minerals. Why is this so?
A) Silicates are very heavy.
B) Silicates compose a huge amount of the earth's crust.
C) Silicates are only found in igneous rocks.
D) Silicates are very rare.

Question

Quizplus · Accepted Answer

Silicates compose a huge amount of the earth's crust, and igneous rocks are formed from the solidification of magma or lava, which is predominantly composed of silicate minerals. Therefore, it makes sense that igneous rocks are overwhelmingly composed of silicates.

Igneous Rocks Are Overwhelmingly Composed of Silicate Minerals