Oceanic crust is less dense than continental crust because it is made of silica and manganese.

Name: Oceanic crust is less dense than continental crust because it is made of silica and manganese.
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Oceanic crust is actually more dense than continental crust because it is made of basalt and gabbro, which are denser than the rock types that make up continental crust. Silica and manganese do make up a portion of oceanic crust, but they do not contribute to its density.

Oceanic Crust Is Less Dense Than Continental Crust Because It