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Top 10 Deepest Part of the Ocean

Written by Top 100 Arena on 2012-08-30
Some places on the ocean floor, there exists unusually deep zones which are nearly three times deeper than the average depth of the sea. These zones are known as deep sea trenches. The trench zones are characterized by complete darkness and unimaginable pressures. We present you the list of the top 10 deepest parts of all the oceans are:

10 Mariana Trench:

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The deepest part of the Earth’s surface, Mariana trench lies in Pacific Ocean at Challenger Deep. It was created by ocean-to-ocean sub duction, a phenomena in which a plate topped by oceanic crust is sub ducted beneath another plate topped by oceanic crust. The trench is about 2,550 kilometres long and 69 kilometres wide. It reaches a maximum-known depth of 10.994 km. There have been 4 descents in Marine Trench by different bathyscaphes. Expeditions conducted before have discovered living creatures such as sole, flounder and flatfish at the bottom of the trench. More info

9 Tonga Trench:

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The Tonga trench is the second deepest part of the ocean discovered through human efforts. Its deepest point is 35,702 ft deep and it lies in the Pacific Ocean too. The trench lies at the northern end of the Kermadec-Tonga subduction Zone, an active subduction zone where the Pacific Plate is being subducted below the Tonga Plate and the Indo-Australian Plate. The edge of the trench is dotted with volcanoes. In 2007 it was reported that Massive underwater volcanoes were slipping into a highly active fault line in the Tonga Trench. More info

8 Kuril-Kamchatka Trench:

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The Kuril-Kamchatka trench is a narrow, deep depression in the Pacific Ocean along the eastern underwater slopes of the Kuril Islands and the southern part of the Kamchatka Peninsula. It is about 2,000 km long, and its width ranges from 20 to 60 km. The trench formed as a result of the subduction zone that created the Kuril island arc as well as the Kamchatka volcanic arc. The area around this trench is prone to many volcanic activities and earthquakes. More info

7 Philippine Trench:

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The Philippine Trench is a submarine trench to the east of the Philippines. Its deepest point has a depth of 34,600 feet. The trench was formed due to the collision of two tectonic plates: the Philippine sea plate and the Eurasian plate. This activity has caused a lot of volcanic eruptions in that area. In 1668, the Philippine Trench tsunami stuck land at a wave height of 4 metres. More info

6 Kermadec Trench:

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The Kermadec Trench was formed due to subduction of Pacific Ocean under the Indo-Australian plate. It is 32,963 ft deep and is considered as one of the last untouched wilderness area of the Earth. The volcanic islands around the Kermadec Trench are the only uninhabited islands in that hemisphere. In 2012, scientists discovered a supergiant- a type of amphipod in the Kermadec Trench of the Pacific Ocean. More info

5 Puerto Rican Trench:

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The Puerto Rico Trench is located on the boundary between the Caribbean Sea and the Atlantic Ocean. The trench is 800 kilometres long and has a maximum depth of 8,648 metres at Milwaukee Deep, which is the deepest point in the Atlantic Ocean. The Puerto Rico Trench is also associated with the most negative gravity on earth, -380 milliGal, which indicates the presence of an active downward force. The region has high seismicity and thus witness large earthquakes. A magnitude 7.5 earthquake centred northwest of Puerto Rico in 1943, and magnitude 8.1 and 6.9 earthquakes north of Hispaniola in 1946 and 1953, respectively stuck land around that area. More info

4 South Sandwich Trench:

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The South Sandwich Trench is a tectonic plate under the Scotia Sea near Antarctica. It is located west of the Mid-Atlantic Ridge between South America and Antarctica. The trench is 965 km long and has a maximum depth of 8,428 metres below sea level. The island around the trench consists of the South Sandwich Trench Islands which are surrounded by glaciers and volcanoes. More info

3 Romanche Trench:

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It is the third deepest of the major trenches of the Atlantic Ocean, after the Puerto Rico Trench and the South Sandwich Trench. Reaching a maximum depth of 25,453 feet, it represents one of the ocean’s deepest soundings. The trench is covered by debris of course, fragmented rocks resulting from gravitational sliding and slumping. The depth makes this place an ideal habitation for the deep water fish. It is also ideal for other exotic oceanic life. It is also known by its other name, The Romanche Gap. More info

2 Sunda Trench:

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Also known as the Java trench, it is located in the north eastern Indian Ocean, with a length of 2,600 kilometres and a maximum depth of 7,725 metres. It is a part of the Pacific ring of fire and a ring of oceanic trenches around the northern edges of the Australian Plate. A string of volcanoes have resulted behind the Sunda trench, strung out across Sumatra and Java. The trench is divided into two parallel troughs by an underwater ridge and much of the trench is at least partially filled with sediments. More info

1 Eurasian Basin:

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This trench lies at a depth of 5,450 m and runs for about 350 kilometres under the frozen waters of Arctic Ocean. It is the deepest part of the Arctic Ocean and has the geographic North Pole located over its floor. The Eurasia Basin was formed by seafloor spreading along the axis of the Nansen-Gakkel Ridge. This spreading in the Eurasian Basin has been a result of motion between the North American and Eurasian plates since the beginning of the formation of the Earth. More info

Even though the environment may seem inhospitable around the trenches, life is found thriving in the deepest parts of the oceans. This is surely a mesmerizing form of nature that is still away from the humans.

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