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The process where the ocean floor sinks beneath the crust and back into the mantle is known as subduction. This is the result of the collision of two tectonic plates. This in turn results in the formation of fold mountains and volcanism (such as that which occurs in the Western US - for example Mt. St. Helens and the Western coast of South America).

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13y ago
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Q: What is a result in the process where the ocean floor sinks beneath the crust and back into the mantle?
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