The process of low-grade metamorphic rocks being altered to form high-grade metamorphic rocks is termed ________ metamorphism.
A)foliated
B)prograde
C)retrograde
D)dynamic

Question

Quizplus · Accepted Answer

Prograde metamorphism refers to the process of low-grade metamorphic rocks being altered to form high-grade metamorphic rocks under conditions of increasing pressure and temperature. Retrograde metamorphism, on the other hand, refers to the opposite process where high-grade metamorphic rocks are altered to lower-grade rocks due to decreasing pressure and temperature. Foliated metamorphism refers to the alignment of mineral grains in a rock due to pressure, while dynamic metamorphism refers to the changes that occur in a rock due to mechanical deformation, such as faulting or shearing.

The Process of Low-Grade Metamorphic Rocks Being Altered to Form