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deep-sea trench

См. также в других словарях:

  • deep-sea trench — or oceanic trench Any long, narrow, steep sided depression in the ocean bottom in which maximum oceanic depths (24,000–36,000 ft, or 7,000–11,000 m) occur. The deepest known depression of this kind is the Mariana Trench. Most trenches occur at… …   Universalium

  • deep-sea trench —   see ocean trench …   Geography glossary

  • Deep sea — zones For the IMAX film, see Deep Sea 3D. The deep sea, or deep layer[1], is the lowest layer in the ocean, existing below the thermocline and above the seabed, at a depth of 1000 fathoms …   Wikipedia

  • Deep-sea exploration — is the investigation of physical, chemical, and biological conditions on the sea bed, for scientific or commercial purposes. Deep sea exploration is considered as a relatively recent human activity compared to the other areas of geophysical… …   Wikipedia

  • Deep sea physical oceanography — is the study of flow dynamics, geology and geophysics, and thermo and hydrodynamics of the deep sea, where deep sea means below 15 m. The flow of the ocean in deep sea is dramatically slowed than that of the surf zone and surface flow. This is… …   Wikipedia

  • Deep sea communities — giant tubeworm Deep sea communities currently remain largely unexplored, due the technological and logististical challenges and expense involved in visiting these remote biomes. Because of the unique challenges (particularly the high barometric… …   Wikipedia

  • trench — /trench/, n. 1. Fort. a long, narrow excavation in the ground, the earth from which is thrown up in front to serve as a shelter from enemy fire or attack. 2. trenches, a system of such excavations, with their embankments, etc. 3. a deep furrow,… …   Universalium

  • Trench — /trench/, n. Richard Chenevix /shen euh vee/, 1807 86, English clergyman and scholar, born in Ireland. * * * (as used in expressions) deep sea trench oceanic trench Mariana Trench trench warfare * * * …   Universalium

  • deep — deepness, n. /deep/, adj. deeper, deepest, n., adv., deeper, deepest. adj. 1. extending far down from the top or surface: a deep well; a deep valley. 2. extending far in or back from the front or from an edge, surface, opening, etc., considered… …   Universalium

  • sea — /see/, n. 1. the salt waters that cover the greater part of the earth s surface. 2. a division of these waters, of considerable extent, more or less definitely marked off by land boundaries: the North Sea. 3. one of the seven seas; ocean. 4. a… …   Universalium

  • Deep ocean water — (DOW) is the name for cold, salty water found deep below the surface of Earth s oceans. Ocean water differs in temperature and salinity, with warm, relatively non salty water found at the surface, and very cold salty water found deeper below the… …   Wikipedia

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