Elongated or "smeared" mineral grains indicate that a rock was subjected to
A)shearing.
B)compression.
C)tension.
D)Pressure solution.

Question

Quizplus · Accepted Answer

Elongated or "smeared" mineral grains indicate that a rock was subjected to shearing, which involves the movement of one part of a rock body in relation to another along a plane of weakness, resulting in deformation and stretching of the mineral grains in that plane. Compression and tension also cause deformation in rocks, but elongated mineral grains are not typically associated with these types of stress. Pressure solution involves the dissolution of minerals at high pressure, and would not lead to elongated mineral grains.

Elongated or "Smeared" Mineral Grains Indicate That a Rock Was