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| Seabed | A Wisdom Archive on Seabed |  | Seabed A selection of articles related to Seabed:
Issues: Climate change Renewable energy replacement of nuclear power and fossil fuels Ocean crisis Seabed trawling Fish population decrease Whale population decrease Dead zones Forest protection Genetic engineering Toxic chemicals Nuclear power and its safe use Sustainable trade Legitimacy of World Trade Organization WTO promotion contrasted with health and environment
The continental crust is the layer of granitic and sedimentary rock which forms the continents and the areas of shallow seabed close to their shores, known as continental shelves. It is less dense and more rigid than the material of the Earth's mantle and thus "floats" on top of it. Continental crust is also less dense than oceanic crust, though it is considerably thicker, averaging 20 to 80 km versus the average oceanic thickness of around 5-10 km
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