Why is one way to distinguish metamorphic rocks from igneous rocks mineralogy?
A) The composition of each rock results in different texture.
B) The composition of each rock results in different colors.
C) Igneous rocks, since formed underground, are made up of the same elements as metamorphic rocks.
D) Metamorphic rocks are primarily made up of silicates, which igneous rocks don't primarily contain when cooled from magma.

Question

Quizplus · Accepted Answer

Metamorphic rocks are primarily made up of silicate minerals, which generally form through the recrystallization of existing minerals under high heat and pressure. Igneous rocks, on the other hand, are formed by the cooling and solidification of magma or lava, and may not necessarily contain silicate minerals at all. Therefore, mineralogy can be used as a way to distinguish between these two types of rocks. The other options (A, B, and C) are not necessarily accurate ways to distinguish between metamorphic and igneous rocks.

Why Is One Way to Distinguish Metamorphic Rocks from Igneous