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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.
Differences between continental and oceanic crust are summarised in the table below. COMPARISON BETWEEN CONTINENTAL & OCEANIC CRUST Feature Continental Crust Oceanic crust Global distribution 35% of Earthâs surface-mainly in the northern hemisphere. 65% of Earthâs surface-mainly in the southern hemisphere.ifferences between continental and oceanic crust are summarised in the table below. COMPARISON BETWEEN CONTINENTAL & OCEANIC CRUST Feature Continental Crust Oceanic crust Global distribution 35% of Earthâs surface-mainly in the northern hemisphere. 65% of Earthâs surface-mainly in the southern hemisphere.