The transformation of low-grade metamorphic rocks into high-grade metamorphic rocks is termed ________ metamorphism.
A) foliated
B) prograde
C) retrograde
D) dynamic

Question

Quizplus · Accepted Answer

Prograde metamorphism refers to the transformation of low-grade metamorphic rocks into high-grade metamorphic rocks under increasing temperature and pressure conditions. This occurs during regional metamorphism where rocks are subjected to deep burial and mountain building processes. Foliated metamorphism refers to the development of a layered or banded appearance in metamorphic rocks due to the alignment of minerals during deformation. Retrograde metamorphism occurs when rocks experience a decrease in temperature and pressure conditions, leading to the transformation of high-grade metamorphic rocks into low-grade metamorphic rocks. Dynamic metamorphism occurs due to mechanical deformation of rocks along fault zones or shear zones.

The Transformation of Low-Grade Metamorphic Rocks into High-Grade Metamorphic Rocks