A geologist would expect rocks, such as shale, limestone, and marble, tend to deform in a(n) ____ manner when stress is applied because these rocks are softer and behave differently to stress than rocks like granite.
A) brittle
B) fracture
C) plastic
D) fragile

Question

Quizplus · Accepted Answer

Shale, limestone, and marble are sedimentary rocks that are softer and more ductile than igneous or metamorphic rocks such as granite. When stress is applied, these rocks tend to deform in a plastic manner, meaning they will show permanent deformation without fracturing. Therefore, the best choice for this question is C) plastic.

A Geologist Would Expect Rocks, Such as Shale, Limestone, and Marble