The Mariana Trench is the deepest known part of the world's oceans, and the lowest elevation of the surface of the Earth's crust. It is located in the western Pacific Ocean, to the east of the Mariana Islands.
The trench is about 1,580 miles (2,550 km) long but has a mean width of only 43 miles (69 km). It reaches a maximum depth of about 36,200 ft (11,033 m) at the Challenger Deep, a small slot-shaped valley in its floor, at its southern end.
The Mariana Trench in perspective.
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