Intrusive igneous rocks form when magma solidifies:
A) on the Earth's surface.
B) within the Earth.
C) on the sea floor.
D) on mountain tops.

Question

Quizplus · Accepted Answer

Intrusive igneous rocks form when magma solidifies within the Earth, typically at depths greater than 2.5 kilometers. This slow cooling process allows for the formation of larger crystals, resulting in coarse-grained textures commonly seen in intrusive rocks such as granite and gabbro. Igneous rocks that solidify on the Earth's surface are called extrusive or volcanic rocks.

Intrusive Igneous Rocks Form When Magma Solidifies