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Plates collide along continental edges and on ocean floors. When a
plate carrying a continent collides with an oceanic plate, the
oceanic plate goes under the continental plate because oceanic
plates are heavier than continental plates.
When oceanic plates collide with continental plates, the oceanic
plate slides under the continental shelf. When this happens, the
continent may buckle or develop folds. Folds are places
where rocks are bent and become mountains. Another result of the
colliding plates can be the development of faults.
Faults are areas where the plates break apart and
move away from each other. Plate collisions can also cause volcanoes
to occur.
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