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1 водная эрозия
водная эрозия
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
water erosion
The breakdown of solid rock into smaller particles and its removal by water. As weathering, erosion is a natural geological process, but more rapid soil erosion results from poor land-use practices, leading to the loss of fertile topsoil and to the silting of dams, lakes, rivers and harbours. There are three classes of erosion by water. a) Splash erosion occurs when raindrops strike bare soil, causing it to splash, as mud, to flow into spaces in the soil and to turn the upper layer of soil into a structureless, compacted mass that dries with a hard, largely impermeable crust. b) Surface flow occurs when soil is removed with surface run-off during heavy rain. c) Channelized flow occurs when a flowing mixture of water and soil cuts a channel, which is then deepened by further scouring. A minor erosion channel is called a rill, a larger channel a gully. (Source: ALL)
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Русско-французский словарь нормативно-технической терминологии > водная эрозия
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2 мел
мел
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
chalk
A soft, pure, earthy, fine-textured, usually white to light gray or buff limestone of marine origin, consisting almost wholly (90-99%) of calcite, formed mainly by shallow-water accumulation of calcareous tests of floating microorganisms (chiefly foraminifers) and of comminuted remains of calcareous algae (such as cocoliths and rhabdoliths), set in a structureless matrix of very finely crystalline calcite. The rock is porous, somewhat friable, and only slightly coherent. It may include the remains of bottom-dwelling forms (e.g. ammonites, echinoderms, and pelecypods), and nodules of chert and pyrite. The best known and most widespread chalks are of Cretaceous age, such as those exposed in cliffs on both sides of the English Channel. (Source: BJGEO)
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Русско-французский словарь нормативно-технической терминологии > мел
См. также в других словарях:
Structureless — Struc ture*less, a. Without a definite structure, or arrangement of parts; without organization; devoid of cells; homogeneous; as, a structureless membrane. [1913 Webster] … The Collaborative International Dictionary of English
structureless — struc·ture·less strək chər ləs adj lacking structure esp devoid of cells <a structureless membrane> struc·ture·less·ness n … Medical dictionary
Structureless particle — A structureless particle is an ideal particle which does not have any internal degrees of freedom. The terminology is used in statistical thermodynamics to refer to either a boson or fermion, often in the context of deriving the partition… … Wikipedia
structureless — adjective see structure I … New Collegiate Dictionary
structureless — structurelessness, n. /struk cheuhr lis/, adj. without structure, organization, or arrangement; formless. [1840 50; STRUCTURE + LESS] * * * … Universalium
structureless — adjective Lacking structure … Wiktionary
structureless — struc·ture·less || strÊŒktʃə(r)lɪs adj. lacking a structure, lacking a framework; disorganized … English contemporary dictionary
structureless — struc·ture·less … English syllables
structureless — … Useful english dictionary
periplasmic space — Structureless region between the plasma membrane and the cell wall of Gram negative bacteria … Dictionary of molecular biology
Soil structure — is determined by how individual soil granules clump or bind together and aggregate, and therefore, the arrangement of soil pores between them. Soil structure has a major influence on water and air movement, biological activity, root growth and… … Wikipedia