Marble and Quartzite Are Nonfoliated Rocks Because ________

Multiple Choice

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