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Oceanic lithosphere slides down the sides of the oceanic ridge, pushing the plates apart.
The theory that the rigid lithosphere of Earth is divided into different sections that "float" along on top of the weaker mantle region.
A rising plume of mantle material is located below the crust, which melts the rock near the surface, allowing magma to move though.
The continents were once connected as a single supercontinent, and slowly moved apart.
Continental volcanic arc
Produced in part by the volcanic activity that is caused by the subduction of oceanic lithosphere under a continental plate.
Old oceanic crust, which is relatively cool, sinks into the asthenosphere (mantle) and "pulls" the trailing lithosphere (crust) along
Destructive plate margin where oceanic crust is being pushed down into the mantle by a second plate.
Volcanic island arc
A chain of small volcanic islands created by the subduction of oceanic plates under another oceanic plate.
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