The size, shape, and geometric arrangement of mineral grains in igneous rocks is called ________ and it indicates ________.
A)aphanitic form, how much water was present in the melt
B)igneous geometry, the original % of partial melting
C)geomorphology, depth of origin for the original magma
D)texture, the environmental conditions in which the rock formed

Question

Quizplus · Accepted Answer

Texture is the size, shape, and geometric arrangement of mineral grains in igneous rocks, which gives important clues about the environmental conditions in which the rock formed. Choices A, B, and C are incorrect because aphanitic form refers to the texture of fine-grained igneous rocks, not the size, shape, and arrangement of mineral grains, the term "igneous geometry" is not a commonly used term, and geomorphology refers to the study of landforms, not the texture of rocks.

The Size, Shape, and Geometric Arrangement of Mineral Grains in Igneous