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Marianas trench

The Columbia Encyclopedia, Sixth Edition | 2008 | Copyright

Marianas trench Marianas trough, or Marianas deep , elongated depression on the Pacific Ocean floor, 210 mi (338 km) SW of Guam. It is the deepest (35,798.6 ft/10,911.5 m at the Challenger Deep) known depression on the earth's surface. A U.S. navy bathyscape reached its bottom in 1960; a 1995 Japanese probe made what is probably the most accurate measurement of its depth.

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"Marianas trench." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 10 Feb. 2010 <http://www.encyclopedia.com>.

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Related newspaper, magazine, and trade journal articles from HighBeam Research

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	Marianas trench Book article from: The Columbia Encyclopedia, Sixth Edition Marianas trench Marianas trough, or Marianas deep , elongated depression on the Pacific Ocean floor, 210 mi (338 km) SW of Guam. It is the deepest (35,798.6 ft/10,911.5 m at the Challenger Deep) known depression on the earth's...
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