The concept of metamorphic facies ____.
A)cannot be used in areas where the original rocks were clay-rich
B)cannot be used in areas where the original rocks were pure quartz sandstone
C)was developed in Italy in the 1600s
D)is not as useful as the concept of metamorphic zones
E)relies on finding a single index mineral in a particular zone

Question

Quizplus · Accepted Answer

Metamorphic facies are based on the mineral assemblages present in rocks undergoing metamorphism. However, in areas where the original rock was pure quartz sandstone, there is no change in mineral assemblages during metamorphism, so the concept of metamorphic facies cannot be applied.

The Concept of Metamorphic Facies ____