Oceanic crust

Oceanic crust

Jesse Russell Ronald Cohn

     

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ISBN: 978-5-5112-8423-1

High Quality Content by WIKIPEDIA articles! Oceanic crust is the part of Earth`s lithosphere that surfaces in the ocean basins. Oceanic crust is primarily composed of mafic rocks, or sima, which is rich in iron and magnesium. It is thinner than continental crust, or sial, generally less than 10 kilometers thick, however it is denser, having a mean density of about 3.3 grams per cubic centimeter.

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