A nonfoliated metamorphic rock not created by pressure or differential stress, but by being baked by an igneous intrusion, is a:
A) hornfels
B) schist
C) slate
D) phyllite

Question

Quizplus · Accepted Answer

Hornfels is a nonfoliated metamorphic rock that forms through contact metamorphism, which occurs when rocks are heated by the intrusion of hot magma from the Earth's interior without significant pressure or differential stress, leading to the recrystallization of the rock without the development of foliation.

A Nonfoliated Metamorphic Rock Not Created by Pressure or Differential