A shale metamorphosed to high metamorphic grade would become a(n)
A) slate.
B) amphibolite.
C) schist.
D) gneiss.

Question

Quizplus · Accepted Answer

A shale that undergoes high-grade metamorphism will transform into a gneiss. This is because the intense heat and pressure of high-grade metamorphism causes minerals to recrystallize and reorganize, resulting in the formation of bands of different minerals that give gneiss its characteristic banded appearance.

A Shale Metamorphosed to High Metamorphic Grade Would Become A(n)