Mariana Trench

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A crescent-shaped subduction trench in the western Pacific, east and south of the Mariana Islands, formed where the Pacific Plate is subducted beneath the smaller Mariana Plate. Commonly reported as roughly 2,550 km long and about 69 km wide. Because it is an arc thousands of kilometres long, no single coordinate represents it; the point given here is an indicative centroid near the southern end and must not be read as the trench's position.