diapir

diapir
—diapiric /duy'euh pir"ik/, adj.
/duy"euh pear'/, n. Geol.
a dome, or anticline, the upper regions of which have been ruptured and penetrated by material squeezed up from below. Cf. plume (def. 10), salt dome.
[1915-20; < F, said to be < Gk diapeírein to drive through, pierce; dia- DIA- + peírein to pierce]

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      (from Greek diapeirein, “to pierce”), geological structure consisting of mobile material that was forced into more brittle surrounding rocks, usually by the upward flow of material from a parent stratum. The flow may be produced by gravitational forces (heavy rocks causing underlying lighter rocks to rise), tectonic forces (mobile rocks being squeezed through less mobile rocks by lateral stress), or a combination of both. Diapirs may take the shape of domes, waves, mushrooms, teardrops, or dikes. Because salt flows quite readily, diapirs are often associated with salt domes (salt dome) or salt anticlines; in some cases the diapiric process is thought to be the mode of origin for a salt dome itself.

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Universalium. 2010.

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Look at other dictionaries:

  • diapir — diapír s. n. (sil. di a ), pl. diapíre Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  DIAPÍR s.n. (geol.) Cută anticlinală caracterizată prin prezenţa unui sâmbure de roci plastice care străbat rocile acoperitoare. [pron. di a . / cf …   Dicționar Român

  • diapir — ● diapir nom masculin (grec diapeirein, transpercer) Structure géologique correspondant à un pli résultant de l ascension d un matériel plastique au travers de formations plus denses …   Encyclopédie Universelle

  • Diapir —   [griechisch] der, s/ e, größerer, pilz , kuppel oder blasenförmiger Gesteins oder Magmenkörper, der v. a. aufgrund geringerer Dichte als im Hangenden und/oder aufgrund großer Plastizität die überlagernden Schichten durchbrochen hat und, Klüfte …   Universal-Lexikon

  • diapir — [dī′ə pir΄] n. Geol. a dome formation in which the rigid top layers have been split open by pressure from an underlying plastic core diapiric [dī΄ə pir′ik] adj …   English World dictionary

  • Diapir — Une lampe à lave illustre de manière simple le principe du diapir En géologie, un diapir (du grec diapeirein, percer au travers) est une structure plus ou moins globuleuse, résultant de la remontée de roches plus légères à travers des roches plus …   Wikipédia en Français

  • Diapir — For the undergarment, see Diaper. An original Mathmos Astro lava lamp. A lava lamp illustrates Rayleigh–Taylor instability type diapirism in which the tectonic stresses are low. A diapir ( …   Wikipedia

  • Diapir — Lavalampe Anschauungsobjekt für das Phänomen des Diapirismus Ein Diapir (von altgriechisch διαπείρειν diapeirein durchdringen) ist in der Geologie ein aufsteigender Bereich oder Körper eines Materials (z. B. Magma) mit einer geringeren Dichte als …   Deutsch Wikipedia

  • diapir — noun Etymology: French, probably from Greek diapeirein to drive through, from dia + peirein to pierce; akin to Greek poros passage more at fare Date: 1918 an anticlinal fold in which a mobile core has broken through brittle overlying rocks •… …   New Collegiate Dictionary

  • diapir — noun An intrusion of a ductile rock into an overburden …   Wiktionary

  • Diapir — Di|a|pir 〈m.; Gen.: s, Pl.: e; Geol.〉 zumeist aus Salz bestehender Gesteinskörper, der bei Faltungen durch höhere Gesteinsschichten gepresst wurde, Salzdom, Salzhorst, Salzstock [Etym.: zu grch. diapeirein »durchbohren«] …   Lexikalische Deutsches Wörterbuch

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