craton

/kray"ton/, n. Geol.
a relatively rigid and immobile region of continental portions of the earth's crust.
[1940-45; < G Kraton, based on Gk krátos power; cf. -CRACY, -ON2]

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      the stable interior portion of a continent characteristically composed of ancient crystalline basement rock. The term craton is used to distinguish such regions from mobile geosynclinal troughs, which are linear belts of sediment accumulations subject to subsidence (i.e., downwarping). The extensive central cratons of continents may consist of both shields and platforms. A shield is that part of a craton in which (usually) Precambrian basement rocks crop out extensively at the surface. By contrast, in a platform the basement is overlain by horizontal or subhorizontal sediments.

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Universalium. 2010.

Look at other dictionaries:

  • craton — ● craton nom masculin Vaste portion de croûte continentale stable, en dehors des zones orogéniques. craton [kʀatɔ̃] n. m. ÉTYM. 1974, Sciences et Avenir; angl. craton, de crater « cratère ». ❖ ♦ Géol. Aire continentale correspondant à une zone… …   Encyclopédie Universelle

  • craton — [krā′tän] n. a stable, broad, horizontal rock formation of the earth s crust, that is the principal part of a continent and its continental shelf cratonic [krə tän′ik] adj …   English World dictionary

  • Craton — Les grandes régions géologiques (USGS) Les cratons apparaissent en orange Un craton (du grec κράτος = kratos force) est un élément de lithosphère continentale possédant une identité géologique, notamment en termes de nature des roches et de… …   Wikipédia en Français

  • Craton — Geologic provinces of the world (USGS)   Shield …   Wikipedia

  • Cratón — Zonas geológicas de la Tierra (USGS.) Corteza oceánica (según su edad)      0 20 Ma …   Wikipedia Español

  • Craton, SS. — SS. Craton et Soc. MM. (15. Febr.). Vom Griech. κρατεῖν = stark, mächtig seyn, herrschen etc. – Der hl. Craton, ein berühmter Redner zu Rom, wurde von dem hl. Bischof Valentinus von Terni im christlichen Glauben unterrichtet und mit seiner ganzen …   Vollständiges Heiligen-Lexikon

  • craton — platforma statusas T sritis ekologija ir aplinkotyra apibrėžtis Didelė nejudri Žemės plutos sritis, mažai raukšlėta arba visai be raukšlių. Apatinį platformos aukštą sudaro raukšlėtasis pamatas, ant jo slūgso viršutinis aukštas – nuosėdų danga.… …   Ekologijos terminų aiškinamasis žodynas

  • craton — noun Etymology: German Kraton, modification of Greek kratos strength more at hard Date: 1944 a stable relatively immobile area of the earth s crust that forms the nuclear mass of a continent or the central basin of an ocean • cratonic adjective …   New Collegiate Dictionary

  • craton — noun A part of the Earth’s crust that has survived the splitting and merging of continents …   Wiktionary

  • craton —   see shield area …   Geography glossary

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