Areas of upwelling material from the mantle to form new seafloor occur along
A) divergent boundaries.
B) areas of seafloor spreading.
C) transform boundaries.
D) convergent boundaries.

Question

Quizplus · Accepted Answer

Upwelling material from the mantle occurs at divergent boundaries, where two tectonic plates move away from each other and new crust is formed through seafloor spreading. As the plates move apart, magma rises up through the mantle, forming new oceanic crust at the mid-ocean ridge. This process is known as mantle convection.  Therefore, choice A is the best option.

Areas of Upwelling Material from the Mantle to Form New