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Title: Seafloor Spreading and Plate Boundaries.
Caption: This animation depicts a 100,000-year time span of seafloor spreading. It details the upwelling of magma at a midocean ridge along with associated transform faults. It also shows the subduction of oceanic crust under continental crust and the resulting formation of magma and subsequent volcanism.
Keywords: plate tectonics, tectonic plates, divergent boundary, divergent boundaries, mid-ocean ridges, seafloor spreading, convergent boundary, convergent boundaries, subduction, asthenosphere, lithosphere, oceanic crust, continental crust, continental volcanic arcs, magma, volcanoes