Continental crust facts for kids

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The thickness of the Earth's crust (km).

The continental crust is the layer of granitic, sedimentary, and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves.

It consists mostly of sialic rock. It is less dense than the material of the Earth's mantle, which consists of mafic rock. Continental crust is also less dense than oceanic crust, though it is considerably thicker; mostly 35 to 40 km versus the average oceanic thickness of around 7–10 km. About 40% of the Earth's surface is now underlain by continental crust.

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Continental crust Facts for Kids. Kiddle Encyclopedia.