blue-lias

blue-lias
(blou-li-â) s. m.
Terme de géologie. Couche de l'étage inférieur des terrains jurassiques, formée, en Angleterre, d'alternances d'argile et de calcaire marneux, et renfermant beaucoup de débris fossiles.
   Angl. blue, bleu, et lias.

Dictionnaire de la Langue Française d'Émile Littré. . 1872-1877.

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  • Blue Lias — is a sequence of layers of limestones and shales, laid down in Jurassic times, between 195 and 200 million years ago. In geology, it corresponds with the Hettangian stage of the Jurassic. It is the lowest of the three divisions of the Lower… …   Wikipedia

  • Blue Lias — Saltar a navegación, búsqueda Blue Lias en Lyme Regis, Dorset, UK Blue Lias es una secuencia de capas de piedra caliza y pizarra, establecido en el Jurásico, hace entre 195 y 200 millones de años. En geología, corresponde con el período …   Wikipedia Español

  • Blue-Lias-Formation — Die Blue Lias Formation ist eine sedimentäre Formation, die im Süden, Westen und Osten Englands sowie im südlichen Wales, in Nordirland und im Westen Schottlands auftritt. Sie wurde im Zeitraum Oberste Trias bis Unterer Jura abgelagert.… …   Deutsch Wikipedia

  • Lias — may refer to: * Lias (Troll), a troll drummer in the book Soul Music by Terry Pratchett * Lias (group), a stratigraphic group used in large parts of Europe, formed during the Early Jurassic epoch. See also Blue Lias. * Lias, Gers, a commune of… …   Wikipedia

  • Lias (group) — White Lias is a stone which only occurs locally in Warwickshire and part of Somerset. The name lias is derived from quarrymen s dialect for layers as white lias and the more common blue lias can be seen as being in natural layers when quarried.… …   Wikipedia

  • Lias Group — The Lias Group or Lias is a lithostratigraphic unit (a sequence of rock strata) found in a large area of western Europe, including the British Isles, the North Sea, the low countries and the north of Germany. It consists of marine limestones,… …   Wikipedia

  • lias — [ lʌɪəs] noun 1》 (Lias) Geology the earliest epoch of the Jurassic period, from about 208 to 178 million years ago. 2》 (also blue lias) a blue grey clayey limestone of this epoch, found chiefly in SW England. Derivatives liassic adjective Origin… …   English new terms dictionary

  • lias — n. 1 (Lias) Geol. the lower strata of the Jurassic system of rocks, consisting of shales and limestones rich in fossils. 2 a blue limestone rock found in SW England. Derivatives: liassic adj. (in sense 1). Etymology: ME f. OF liois hard limestone …   Useful english dictionary

  • lias — noun /ˈlaɪəs/ a) A type of blue limestone present in parts of southern England. b) A stratigraphic group from the lower Jurassic period, consisting of thin layers of blue limestone …   Wiktionary

  • Geology of Somerset — Somerset is a rural county in the southwest of England, covering convert|4171|km2|sqmi|0. It is bounded on the north west by the Bristol Channel, on the north by Bristol and Gloucestershire, on the north east by Wiltshire, on the south east by… …   Wikipedia

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