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Sea floor spreading creates new sea floor, but the diameter of the earth doesn't increase because another process melts old sea floor back into magma. What is the name of this process?
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Sea floor spreading creates new sea floor, but the diameter of the earth doesn't increase because another process melts old sea floor back into magma. What is the name of this process?

User Wolfish
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The answer is subduction.

User Newgre
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Could it be subduction? 
User Djkato
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