Friday, March 2, 2012

Earth's Crust

The Earth's core is made of an alloy of iron and nickel. The mantle is most of the volume of the Earth and is a "plastic" like material. The thin, rocky outer layer of the the Earth is the crust. The ocean floor crust is basalt while the continental crust is mostly granite. The lithoshere is the crust and the upper mantle.

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