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I dnt know that's why im asking you

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12y ago
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11y ago

They discovered that magma from deep in the earths mantle was able to rise through vents or cracks in the ridges to add to the ocean floor! :)

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13y ago

When the matter was forced deep enough into the mantle,the heat was grate enough to make the matter molten once again.

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Q: Why didn't the mantle itself shrink and the thickness of the crust increase?
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