Why do mantle plumes tend to concentrate beneath supercontinents such as Pangaea?
A)Concentrations of radioactive materials build up as continents assemble.
B)Partial melting from subduction concentrates large volumes of magma.
C)A large landmass acts as an insulating blanket to trap heat in the mantle.
D)Friction from converging landmasses heats up the mantle.

Question

Quizplus · Accepted Answer

A large landmass acts as an insulating blanket, trapping heat in the mantle beneath the supercontinent. This trapped heat can lead to the formation of mantle plumes as the mantle material heats up, becomes buoyant, and rises.

Why Do Mantle Plumes Tend to Concentrate Beneath Supercontinents Such