What is foliation?
A)Intergrown mineral crystals formed from cooling magma
B)Randomly oriented mineral crystals placed due to confining pressure
C)Thin, parallel layers of clay sediments that have been compressed
D)Roughly parallel layers of mineral crystals aligned perpendicular to the direction of pressure

Question

Quizplus · Accepted Answer

Foliation refers to the parallel alignment of mineral crystals in a rock due to pressure during its formation. This creates distinct layers, or folia, in the rock. Option A describes crystal growth in igneous rocks, option B describes the placement of minerals due to pressure without the distinct layering of foliation, and option C describes the formation of shale, but not necessarily foliation.

What Is Foliation