a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
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Culture definitions for sea floor spreading
sea floor spreading
Sea floor spreading is making the Atlantic Ocean wider by a few inches each year.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.