Q146
Which of the following are Metamorphic rocks?
A.
Gneiss and Mafic
B.
Gneiss and Schist
AnswerC.
Schist and Mafic
D.
Schist and Chalk
Answer: Option B
Solution
Answer: Option B
Solution:
Schist and gneiss are produced by medium to high grade metamorphism. In some cases gneisses are produced by higher grade metamorphism than schists. Low-grade metamorphic rocks tend to be fine-grained (the newly formed metamorphic mineral grains that is). High-grade metamorphic rocks tend to be coarse-grained.