The two most important sources of heat for metamorphism are:
A) intrusive magma bodies and deep burial.
B) intrusive magma bodies and heat from the core.
C) deep burial and volcanism.
D) radioactive decay and volcanism.
E) radioactive decay and deep burial.

Question

Quizplus · Accepted Answer

Intrusive magma bodies provide a direct source of heat as they intrude into cooler surrounding rock, raising the temperature and potentially causing metamorphism. Deep burial leads to an increase in temperature due to geothermal gradients, where temperature increases with depth in the Earth, also contributing to metamorphism.

The Two Most Important Sources of Heat for Metamorphism Are