
Back-arc basins are geologic features, submarine basins associated with island arcs and subduction zones. They are found at some convergent plate boundaries, presently concentrated in the Western Pacific ocean. Most of them result from tensional forces caused by oceanic trench rollback (the oceanic trench is wandering in the seafloor direction) an...
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http://en.wikipedia.org/wiki/Back-arc_basin

People executed by Saudi Arabia or Saudi Arabian authorities. For people of Saudi Arabian nationality who were executed, see :Category:Executed Saudi Arabian people. ...
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http://en.wikipedia.org/wiki/Back_arc_basin

(from the article `plate tectonics`) Where both converging plates are oceanic, the margin of the older oceanic crust will be subducted because older oceanic crust is colder and therefore ...
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http://www.britannica.com/eb/a-z/b/3

The region between an island arc and the continental mainland, commonly with at least some oceanic crust on its floor.
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https://www.encyclo.co.uk/local/22327
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