From holes in the ground that push up the melted rock
LAva
a Obsidion rock
Lava, granite, etc
a Obsidion rock
Magma is the geological term for melted or molten rock below the earth's surface. Once the magma has reached the surface it is called lava.
Molten rock, when it hits the surface, is known as lava. Before it reaches the surface, it is known as magma.
Volcanoes do not cause rocks to melt, they are just the exit where melted rock come to the earths surface.
It is called magma
Magma, or pyroclastic flow.
If it reaches the surface, it is magma or lava. If it merely intrudes into rocks already formed, it is intrusive. Such as sills and dikes.
Igneous rock. Extrusive igneous rock forms at or near the surface, intrusive igneous rock forms below the surface.
extrusive- when melted rock material coools on earths surface instursive-when the melt cools below earths surface