As compared to coarse-grained igneous rocks,all fine-grained igneous rocks ____________.
A)cool and solidify more quickly
B)cool and solidify more slowly
C)solidify at higher temperatures
D)solidify at lower temperatures

Question

Quizplus · Accepted Answer

Fine-grained igneous rocks have smaller crystal sizes because they cool and solidify more quickly than coarse-grained igneous rocks. This is because fine-grained igneous rocks are formed when magma or lava cools and solidifies quickly at or near the Earth's surface, while coarse-grained igneous rocks are formed when magma cools and solidifies slowly deep within the Earth's crust. Therefore, choice A is the best answer.

As Compared to Coarse-Grained Igneous Rocks,all Fine-Grained Igneous Rocks ____________