Mariana Trench

The Mariana Trench or Marianas Trench is the deepest part of the world's oceans. It is located in the western Pacific Ocean, an average of to the east of the Mariana Islands, in the Western Pacific east of Philippines. It is a crescent-shaped scar in the Earth's crust, and measures about long and wide on average. It reaches a maximum-known depth of (±) at a small slot-shaped valley in its floor known as the Challenger Deep, at its southern end, although some unrepeated measurements place the deepest portion at. For comparison: if Mount Everest were dropped into the trench at this point, its peak would still be over underwater. In 2009, the Marianas Trench was established as a United States National Monument.
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