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Title: Motion at Plate Boundaries.
Caption: This animation details processes of plate tectonics in four separate parts. One part gives a broad picture of plate movements. Three other parts examine activities at the three main types of plate boundaries: divergent boundaries, convergent boundaries, and transform boundaries.
Keywords: plate tectonics, tectonic plates, volcanism, volcanoes, volcanic island arcs, continental volcanic arcs, divergent boundary, mid-ocean ridges, seafloor spreading, convergent boundaries, subduction, trenches