micrite

rock
      sedimentary rock formed of calcareous particles ranging in diameter from 0.06 to 2 mm (0.002 to 0.08 inch) that have been deposited mechanically rather than from solution. The particles, which consist of fossil materials, pebbles and granules of carbonate rock, and oölites (spherical nodules with concentric structure), are transported and sorted by flowing water. When formed almost entirely of shell debris, the rock is termed coquina (q.v.). Coquinite is the consolidated equivalent.

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Universalium. 2010.

Look at other dictionaries:

  • MICRITE — Abréviation de l’américain microcristalline ooze , le terme de micrite désigne une boue microcristalline formée uniquement de carbonate de calcium (calcite ou aragonite) ou de dolomite. Les cristaux mesurent de 1 à 4 micromètres, si bien qu’on ne …   Encyclopédie Universelle

  • Micrite — is a limestone constituent formed of calcareous particles ranging in diameter up to 4 μm formed by the recrystallization of lime mud.[1][2] The term was coined in 1959 by Robert Folk for his carbonate rock classification system.[2] Micrite is… …   Wikipedia

  • micrite —    A microscopic texture. An abbreviation of ‘microcrystalline calcite ooze’ which refers to precipitated finely crystalline carbonate sediments in grains from 1 to 4 microns in diameter [20].    Synonyms: (French.) micrite; (Greek.) micrite;… …   Lexicon of Cave and Karst Terminology

  • Micrite — La micrite est une boue carbonatée très finement cristallisée (cristaux de calcite < à 4 µm) qui contient parfois des micro débris d organismes, de particules argileuses, des oxydes et hydroxydes, des sulfates et des sulfures. La micrite… …   Wikipédia en Français

  • micrite — noun A sedimentary limestone matrix derived from calcite mud …   Wiktionary

  • micrite — …   Useful english dictionary

  • sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

  • biomicrite —    A microscopic textured limestone composed of skeletal grains in a matrix of micrite; micrite is a finely crystalline carbonate sediment with the upper crystalline diameter being 4 microns [20].    Synonyms: (French.) biomicrite; (German.)… …   Lexicon of Cave and Karst Terminology

  • CALCAIRES — Une roche est dite calcaire si elle renferme au moins 50 p. 100 de carbonate de chaux (CaCO3), généralement représenté par de la calcite , plus rarement par de l’aragonite ; les minéraux les plus fréquemment associés au carbonate de chaux dans… …   Encyclopédie Universelle

  • Anticlinal de La Tour-Blanche — L anticlinal de La Tour Blanche est un bombement dans la couverture sédimentaire du Bassin aquitain septentrional. L anticlinal est orienté ouest nord ouest/est sud est et représente la deuxième ride anticlinale. Sommaire 1 Déscription de la… …   Wikipédia en Français

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