Which of the following best describes the conditions of contact metamorphism?
A)Pressures are very high, the rock is deeply buried, and temperatures are raised by the Earth's internal heat.
B)Pressures are fairly low, the rock is in the upper part of the crust, and heat is supplied from a nearby magma body.
C)Depths are fairly shallow, but temperatures and pressures are so high that the rocks begin to partially melt.
D)Heat is generated by shearing and mechanical movements along faults.

Question

Quizplus · Accepted Answer

Contact metamorphism occurs when a preexisting rock is subjected to the heat and pressure generated by contact with a nearby magma body. The pressures are fairly low in the upper part of the crust, and the temperatures are elevated due to the proximity of the magma. This results in recrystallization of the rock and formation of new minerals.

Which of the Following Best Describes the Conditions of Contact