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The plates under the Earth are made of lots of types of rock(sedimentary metamorphic and igneous rock) but underneath is the Earths mantle, a liquid like mix of melted rock.

I am not that old but am taking geography, sorry if this doesn't help but good luck ;)

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12y ago

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Where is the crust thicker - under the continental shelf or under the oceans?

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The what is the thinnest under the oceans and thickest through the continents.?

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