the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
seafloor spreading creates new oceanic crust at a mid-ocean ridge. ... Depending on the boundary type, the two plates will move (one subducted below the other or the two crash along side each other), but the seafloor spreading does't really cause the continental plate to drift in either case.
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the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
seafloor spreading creates new oceanic crust at a mid-ocean ridge. ... Depending on the boundary type, the two plates will move (one subducted below the other or the two crash along side each other), but the seafloor spreading does't really cause the continental plate to drift in either case.