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1 planation surface
surface d'aplanissement; surface d'érosion -
2 planation
См. также в других словарях:
planation surface — ▪ geology Introduction any low relief plain cutting across varied rocks and structures. Among the most common landscapes on Earth, planation surfaces include pediments, pediplains, etchplains, and peneplains. There has been much scientific… … Universalium
planation — [plā nā′shən] n. [ PLANE2 + ATION] the reduction of a land area by erosion to a nearly flat surface … English World dictionary
planation — /play nay sheuhn, pleuh /, n. Geol. the process whereby an irregular land surface is made flat or level by erosion. [1875 80; PLANE1 + ATION] * * * … Universalium
planation — noun The formation of a flat surface by erosion and deposition … Wiktionary
planation — pla•na•tion [[t]pleɪˈneɪ ʃən, plə [/t]] n. gel the erosional work done by streams that contributes to gradation of the land surface • Etymology: 1875–80 … From formal English to slang
planation — /pləˈneɪʃən/ (say pluh nayshuhn) noun Geology the erosional process by which flat surfaces are created on the earth s surface by means of water, as in a river or in the ocean, or by wind, as in a desert …
planation — noun the process of erosion whereby a level surface is produced • Derivationally related forms: ↑plane • Hypernyms: ↑erosion, ↑eroding, ↑eating away, ↑wearing, ↑wearing away … Useful english dictionary
valley — valleylike, adj. /val ee/, n., pl. valleys. 1. an elongated depression between uplands, hills, or mountains, esp. one following the course of a stream. 2. an extensive, more or less flat, and relatively low region drained by a great river system … Universalium
continental landform — ▪ geology Introduction any conspicuous topographic feature on the largest land areas of the Earth. Familiar examples are mountains (including volcanic (volcanism) cones), plateaus, and valleys. (The term landform also can be applied to… … Universalium
Geologic Pediment — A pediment is a gently inclined erosional surface carved into bedrock. It is thinly covered with Fluvial gravel that has developed at the foot of mountains. It develops when running water erodes most of the mass of the mountain. It is typically a … Wikipedia
Western Africa — ▪ region, Africa Introduction region lying south of the Sahara and east and north of the Atlantic Ocean. It is latitudinally divided into two parallel belts of land: the western portion of the Sudan, a geographic area that stretches across… … Universalium