Which of the Following Best Describes the Conditions of Contact

question 78

Multiple Choice

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 gradually by Earth's internally generated heat.
• B)Pressures are fairly low, the rock is in the upper part of the crust, the heat for baking the neighbouring rocks is supplied quickly from the intrusion of a nearby magma body.
• C)Heat is generated very quickly by shearing and mechanical movements along faults.
• D)Depths are so deep and temperatures are so high that the rocks begin to partially melt.