Mid-ocean ridges are elevated above the surrounding seafloor because
A) rising ocean currents create a vacuum that pulls ridges up.
B) the lithosphere is thickest at the ridges so they stand up taller.
C) ridge rocks are hot and therefore are relatively less dense than the surrounding seafloor.
D) ridge rocks are mafic,which are less dense than ultramafic ocean basin rock.

Question

Quizplus · Accepted Answer

Mid-ocean ridges are elevated above the surrounding seafloor because the rocks at the ridges are hot and therefore are relatively less dense than the surrounding seafloor. This buoyancy results in the uplift of the ridges.

Mid-Ocean Ridges Are Elevated Above the Surrounding Seafloor Because