If mineral grains have been smeared out,the rock was subjected to ________.
A)shear
B)compression
C)tension
D)extension

Question

Quizplus · Accepted Answer

Shear is the type of stress that causes rocks to be smeared out, resulting in deformed mineral grains. Shear stress occurs when two parallel forces act in opposite directions, pushing different parts of the rock in different directions. Compression causes rocks to be squeezed together, resulting in shorter, thicker mineral grains. Tension causes rocks to stretch apart, resulting in elongated mineral grains. Extension is a similar process to tension, where rocks are pulled apart, but it often occurs in a more gradual manner, rather than a sudden stretching.

If Mineral Grains Have Been Smeared Out,the Rock Was Subjected