seafloor spreading


noun

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.

Words nearby seafloor spreading

British Dictionary definitions for sea-floor spreading

sea-floor spreading
/ (ˈsiːˌflɔː) /

noun

a series of processes in which new oceanic lithosphere is created at oceanic ridges, spreads away from the ridges, and returns to the earth's interior along subduction zones Also called: ocean floor spreading

Scientific definitions for sea-floor spreading

sea-floor spreading

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. See more at magnetic reversal.