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Layers that are less dense, such as the crust, float on layers that are denser, such as the mantle. Both oceanic crust and continental crust are less dense than the mantle, but oceanic crust is denser than continental crust.This is partly why the continents are at a higher elevation than the ocean floor.ayers that are less dense, such as the crust, float on layers that are denser, such as the mantle. Both oceanic crust and continental crust are less dense than the mantle, but oceanic crust is denser than continental crust.
â¢ Oceanic crust is mainly basalt whereas continental crust is mainly granite. â¢ Oceanic crust is relatively younger than continental crust. â¢ Continental crust is made up of landmasses, whereas oceanic crust is the floor of the oceans.â¢ Continental crust is thicker (25-70 km) than oceanic crust (7-10 km) and is nearly 35-40km deep. Related posts:ceanic Crust. As the name implies, oceanic crust is the floor of the oceans. Obviously, this crust is thinner than the continental crust. The major type of rocks making up oceanic crust is basalt.