Which rock type makes up approximately 90% of the Earth's crust?
A)sedimentary
B)metamorphic
C)igneous
D)clastic
E)foliated

Question

Quizplus · Accepted Answer

Igneous rocks are formed from the cooling and solidification of magma or lava, and they make up approximately 90% of the Earth's crust. Sedimentary and metamorphic rocks also contribute to the crust but at a much lower percentage. Clastic and foliated are not types of rocks, but rather terms used to describe certain characteristics of sedimentary and metamorphic rocks, respectively.

Which Rock Type Makes Up Approximately 90% of the Earth's