Marble and quartzite are nonfoliated rocks because ________.
A)they are never found beneath fault zones or collisional mountain ranges
B)both are dominated by minerals that produce equant grains
C)both are dominated by minerals with crystalline structures that cannot be dissolved
D)dynamothermal metamorphism can break down the structures of their constituent minerals,but neither of these minerals is stable in that metamorphic environment

Question

Quizplus · Accepted Answer

Nonfoliated rocks are those rocks which do not have a banded or layered appearance. Marble and quartzite are nonfoliated rocks because they are dominated by minerals that produce equant grains, which means that the grains in the rock are roughly the same size in all directions. This gives them a uniform, non-layered appearance.

Marble and Quartzite Are Nonfoliated Rocks Because ________