How do igneous rocks melt?

1 Answer
Nov 28, 2015

Answer:

They are melted by lava on the surface or magma in the crust.

Explanation:

Main Idea: Igneous rocks are formed when magma erupts from a volcano and hardens on the surface in the form of lava.

Extrusive (on the surface of the volcano) igneous rocks can be in the form of:
-lava flows
-ash

Intrusive (in the crust of the volcano) rocks can be in the form of:
-batholiths
-crystals
-dykes
-sills
-laccoliths

Sources:
Magmas and Igneous Rock
The Rock Cycle
Melting and Cooling
Igneous Rocks