A nonfoliated contact metamorphic rock is called a
A)gneiss.
B)hornfels.
C)phyllite.
D)schist.

Question

Quizplus · Accepted Answer

Hornfels is the correct answer because it is a nonfoliated metamorphic rock that forms through contact metamorphism when magma intrudes and heats the surrounding rock. Unlike gneiss, phyllite, and schist, which are foliated and show a layered or banded appearance due to the alignment of minerals under pressure, hornfels does not exhibit this characteristic.

A Nonfoliated Contact Metamorphic Rock Is Called a