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The crust consists of two parts: the oceanic and the continental crust.

All of these values vary slightly, of course, but oceanic crust is generally 4 - 7 miles (6 - 11 km) thick, whereas continental crust is much thicker, averaging 20 - 25 miles (30 - 40 km), reaching a maximum of 45 miles (70 km) beneath large mountain ranges (having to do with tectonics and isostacy, the "roots" of a mountain range).

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13y ago

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