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The process that takes place when two tectonic plates collide together, and one is pushed under another.
The process that takes place when two tectonic plates collide together, and one is pushed under another.
This typically occurs when a continental and an oceanic plate meet, with the denser oceanic plate being pushed under the continental plate. The plate is deformed and slides slowly down towards the mantle, at perhaps a few centimetres per year. This often produces a deep trench in the ocean, as in the Marianas, which include the world's deepest ocean trench.