Choose the sources of heat which create metamorphic rocks.

Question

extrusive magma
volcanic ash
geothermal gradient
intrusive magma

Answer 1

The sources of heat that create metamorphic rocks are:

1. Geothermal gradient - This refers to the increase in temperature with depth in the Earth’s crust, which contributes to the metamorphism of rocks.
2. Intrusive magma - When magma intrudes into existing rock formations, the heat from the magma can cause metamorphism in the surrounding rocks.

Extrusive magma and volcanic ash are primarily associated with volcanic activity and the formation of igneous rocks, not metamorphic rocks.