The occurrence of contact metamorphism would be direct evidence for
A)cementation of sedimentary rock.
B)the local intrusion of magma.
C)regional plate collision.
D)lithification of clastics.
E)erosion of surficial layers.

Question

Quizplus · Accepted Answer

Contact metamorphism occurs when an intrusion of magma comes into contact with preexisting rock, causing it to be altered by heat and pressure. Therefore, the occurrence of contact metamorphism would provide direct evidence for the local intrusion of magma.

The Occurrence of Contact Metamorphism Would Be Direct Evidence for