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The Reloca Slide of the central Chile trench is an example of this process. ... Somalia Trench Indian Ocean Somali Deep 6,084 m (19,961 ft) [44] Madagascar Trench
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.
The hadal zone, also known as the hadopelagic zone, is the deepest region of the ocean, lying within oceanic trenches.The hadal zone ranges from around 6 to 11 km (3.7 to 6.8 mi; 20,000 to 36,000 ft) below sea level, and exists in long, narrow, topographic V-shaped depressions.
Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench , at a depth of 10,911 m (35,798 ft) below sea level.
The Tonga Trench constitutes the northern half of the Tonga-Kermadec subduction system, which extends 2,550 km (1,580 mi) between New Zealand and Tonga. [1] The Tonga Trench is an oceanic trench located in the southwestern Pacific Ocean. It is the deepest trench in the Southern hemisphere and the second deepest on Earth after the Mariana Trench.
Constituting the deepest points in the Atlantic Ocean, the trench is 810 kilometres (503 mi) long [7] and has a maximum documented depth between 8,376 metres (27,480 ft) [8] and 8,740 metres (28,675 ft). [7] [9] The deepest point is commonly referred to as the Milwaukee Deep, with the Brownson Deep naming the seabed surrounding it. [10]
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.
Oceanic trenches — the deepest parts of the ocean floor, typically formed when one tectonic plate slides under another. Geology portal; Subcategories.