Magmas rise to shallower depths and intrude the crust or extrude on the surface because__________ .
A) of centrifugal and tidal forces as the Earth spins
B) the pressure at depth is so great that the magmas are forced upwards
C) of buoyancy, the magmas are hotter and less dense than the surrounding rocks where they form
D) earthquakes shake the crust and allow the magma to escape upwards

Question

Quizplus · Accepted Answer

Magmas rise to shallower depths primarily because of buoyancy; they are hotter and less dense than the surrounding rocks, which causes them to move upwards through the Earth's crust.

Magmas Rise to Shallower Depths and Intrude the Crust or Extrude