_________is a nonfoliated rock formed by contact metamorphism of a shale or mudstone.
A)Hornfels
B)Gneiss
C)Schist
D)Marble

Question

Quizplus · Accepted Answer

Hornfels is a nonfoliated rock that is formed by the metamorphism of shale or mudstone due to contact with an igneous intrusion. This contact metamorphism occurs due to the high temperature and pressure exerted by the igneous intrusion, which causes the original rock to recrystallize and form a more dense and hard rock. Gneiss and schist are foliated rocks that are formed by regional metamorphism, and marble is a nonfoliated rock that is formed from the metamorphism of limestone or dolostone.

_________Is a Nonfoliated Rock Formed by Contact Metamorphism of a Shale