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The Mariana Trench is an oceanic trench located in the western Pacific Ocean, about 200 kilometres (124 mi) east of the Mariana Islands; it is the deepest oceanic trench on Earth. It is crescent-shaped and measures about 2,550 km (1,580 mi) in length and 69 km (43 mi) in width.
Map showing the Mariana Trench located southeast of Japan, east of Guam, and north of Papua New Guinea in the ocean territory of the Federated States of Mi Spanish (formal address) Map showing Location inside Mariana trench
President George W. Bush signs paperwork establishing the Mariana Trench Marine National Monument on January 6, 2009 Mariana Trench Map. The Mariana Trench Marine National Monument is a United States National Monument created by President George W. Bush by the presidential proclamation no. 8335 [3] on January 6, 2009.
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The Mariana Islands are at map-right, east of the Philippine Sea and just west of the Mariana Trench in the ocean floor. The Mariana Islands are the southern part of a submerged mountain range that extends 1,565 miles (2,519 km) from Guam to near Japan. Geographically, the Marianas are part of a larger region called Micronesia, situated between ...
Sonar mapping of the Challenger Deep by the DSSV Pressure Drop employing a Kongsberg SIMRAD EM124 multibeam echosounder system (26 April – 4 May 2019). The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is an unusually deep feature in the ocean floor.
Trenches were not clearly defined until the late 1940s and 1950s. The bathymetry of the ocean was poorly known prior to the Challenger expedition of 1872–1876, [12] which took 492 soundings of the deep ocean. [13] At station #225, the expedition discovered Challenger Deep, [14] now known to be the southern end of the Mariana Trench.
Hadal trenches are thought to have formed from the slow subduction of older, dense lithosphere. [22] This is supported by the distribution of hadal zones, most of which in continent-ocean subduction zones. The most well known hadal trench is the Mariana trench, but there are hadal trenches distributed around the world's oceans.