What was the driving mechanism proposed by Hess to explain sea floor spreading?
A) downwelling oceanic currents
B) hydrothermal cells
C) thermal convection cells
D) motions in the outer core
E) thermal convection cells AND motions in the outer core

Question

Quizplus · Accepted Answer

Hess proposed that the driving mechanism behind sea floor spreading was thermal convection cells in Earth's mantle. As these cells heat up, they rise to the surface and spread out, pushing the crust apart and causing sea floor spreading.

What Was the Driving Mechanism Proposed by Hess to Explain