Continental crust is very buoyant compared with oceanic crust because continental crust is
A)predominantly composed of basaltic rock that contains many air bubbles from successive lava flows.
B)predominantly composed of granitic rocks, whereas oceanic crust is composed of basaltic rocks.
C)thinner than the oceanic crust, forming a thin upper skin on the oceanic crust below.
D)very young and fresh.

Question

Quizplus · Accepted Answer

Continental crust is predominantly composed of granitic rocks, which are less dense than the basaltic rocks that make up the oceanic crust. This difference in composition and density makes continental crust more buoyant.

Continental Crust Is Very Buoyant Compared with Oceanic Crust Because