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Deep-sea trench | geology | Britannica.com
Deep-sea trench geology Britannica com
Continental rise | geology | Britannica.com
Continental rise geology Britannica com
bathyscaphe | Definition, History, & Facts | Britannica.com
bathyscaphe Definition History Facts Britannica com
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Indah Ar When there is no electricity in this world
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deep sea trench geology britannica : Deep-sea trench, any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum oceanic depths, approximately 7,300 to more than 11,000 metres (24,000 to 36,000 feet). They typically form in locations where one tectonic plate subducts under another. The deepest knownDeep-sea vent, hydrothermal (-water) vent formed on the ocean floor when seawater circulates through volcanic rocks, often located where new oceanic crust is being formed. Vents also occur on submarine volcanoes. In either case, the solution emerging into cold seawater precipitates mineral deposits that are rich in iron, copper, zinc, and other metals.Tectogene, great downbuckle of the Earth’s crust into the mantle below deep-sea trenches that are filled with marine sediments. The sediments become crumpled and folded within the deep downbuckle; some portions are squeezed downward into the mantle, while others are squeezed upward in highlyCayman Trench, also called Bartlett Deep, or Bartlett Trough, submarine trench on the floor of the western Caribbean Sea between Jamaica and the Cayman Islands. It extends from the Windward Passage at the southeastern tip of Cuba toward Guatemala. The relatively narrow trough trends east-northeast to west-southwest and has a maximum depth of ...The Mariana Trench or Marianas Trench is located in the western Pacific Ocean about 200 kilometres (124 mi) east of the Mariana Islands, and has the deepest natural trench in the world. It is a crescent-shaped trough in the Earth's crust averaging about 2,550 km (1,580 mi) long and 69 km (43 mi) wide.Unlike deep-sea trenches, ... and these channels often emerge in the deep sea on abyssal plains that are found adjacent to the continents, ... Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Submarine canyon. Quick Facts.Mariana Trench, also called Marianas Trench, deep-sea trench in the floor of the western North Pacific Ocean, the deepest such trench known on Earth, located mostly east as well as south of the Mariana Islands.It is part of the western Pacific system of oceanic trenches coinciding with subduction zones—points where two adjacent tectonic plates collide, one being forced below the other.The Peru–Chile Trench, also known as the Atacama Trench, is an oceanic trench in the eastern Pacific Ocean, about 160 kilometres (100 mi) off the coast of Peru and Chile. It reaches a maximum depth of 8,065 meters (26,460 ft) below sea level in Richards Deep and is approximately 5,900 kilometres (3,666 mi) long; its mean width is 64 kilometres (40 mi) and it covers an expanse of some 590,000 ...Oceanic trenches are topographic depressions of the sea floor, relatively narrow in width, but very long. These oceanographic features are the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few millimeters to over ten centimeters per year.The topographic expression of the accretionary wedge forms a lip, which may dam basins of accumulated materials that, otherwise, would be transported into the trench from the overriding plate. Accretionary wedges are the home of mélange, intensely deformed packages of rocks that lack coherent internal layering and coherent internal order.

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Deep-sea trench, any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum oceanic depths, approximately 7,300 to more than 11,000 metres (24,000 to 36,000 feet). They typically form in locations where one tectonic plate subducts under another. The deepest knownSo, expedition scientists were thrilled to discover what they microbial mats in an area where they suspect serpentinization is occurring in the Sirena Deep, a zone east of the Challenger Deep in the Mariana Trench. These 35,100-foot-deep (10,700-meter-deep) clumps of microbes may resemble some of the earliest forms of life.Earth Geology Ocean Floor Image Visual Dictionary Online Ocean Floor Britannica Com 18 1 The Topography Of Sea Floor Physical Geology Ocean Floor Topography And Features Of The 18 1 The Topography Of Sea Floor Physical Geology Geologic Landforms Of The Ocean Floor Chssociology Mr Hunter S ...An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 metres (9,800 ft) and 6,000 metres (20,000 ft).Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest, and least explored regions on Earth.In marine geology, a guyot (pronounced / ɡ iː ˈ j oʊ /), also known as a tablemount, is an isolated underwater volcanic mountain with a flat top more than 200 m (660 ft) below the surface of the sea.The diameters of these flat summits can exceed 10 km (6.2 mi). Guyots are most commonly found in the Pacific Ocean, but they have been identified in all the oceans except the Arctic OceanThe Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. In 2010 the United States Center for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters (36,070 feet) below sea level with an estimated vertical accuracy of ± 40 meters. If Mount ...This is a list of submarine topographical features, oceanic landforms and topographic elements. Abyssal plain. An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 meters ... Hellenic Trench (Metapan Deep System) Ionian SeaThe Challenger Deep, at the bottom of the Mariana Trench, lies deep in the Pacific Ocean near the island of Guam. Only three people have visited the Challenger Deep, the deepest ocean trench in the world: a joint French-American crew (Jacques Piccard and Don Walsh) in 1960 and National Geographic Explorer-in-Residence JamesThe Mariana Trench is the deepest of all ocean trenches. Formed by the same plates that created the Philippine Trench, the Mariana Trench is just northeast of that slightly shallower one, to the east of the Mariana Island chain and just south of Japan. The deepest part, known as the Challenger Deep, is 10,911 meters (35,797 feet) below sea level.

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