Why Does Melting Occur Along Mid-ocean Ridges? As mantle ascends beneath the mid-ocean ridge, less and less rock lies above it, so large pressure changes occur, which leads to melting. The melt is less dense than the solid, and rises to the surface to form the oceanic crust. What type of magma is mafic? Mafic
How Does The Composition Of A Melt Produced By Partial Melting Compare With The Composition Of The Parent Rock? Partial melting occurs in rocks because the different minerals that compose rocks have different melting points. The melt take the compostion of the heated minerals, while the solid parent rocks remains with the solid minerals that
What Is It Called When Magma Solidifies Underground? Igneous rocks are formed from lava or magma. Magma is molten rock that is underground and lava is molten rock that erupts out on the surface. The two main types of igneous rocks are plutonic rocks and volcanic rocks. Plutonic rocks What happens when magma solidifies underground?