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Mariana Trench
The Mariana Trench is the deepest known submarine trench. It is also the deepest known location on Earth itself.[1] It lies south and east of the Mariana Islands, and has a depth up to 10,971 m (7 miles). The western end of the trench is near Guam.
The trench is about 2,550 kilometres (1,580 miles) long but only an average of 69 kilometres (43 miles) wide.
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