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sea-floor spreading


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. In the theory of plate tectonics, the process by which new oceanic crust is formed by the convective upwelling of magma at mid-ocean ridges, resulting in the continuous lateral displacement of existing oceanic crust.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative form of seafloor spreading.


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