TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

BIOMICRITE [1 record]

Record 1 2001-03-15

English

Subject field(s)
  • Petrography
  • Geochemistry
  • Geology
DEF

A limestone consisting of a variable proportion of skeletal debris and carbonate mud (micrite); specifically a limestone containing less than 25% intraclasts and less than 25% ooliths, with a volume ratio of fossils and fossil fragments to pellets greater than 3 to 1, and the carbonate-mud matrix more abundant than the sparry-calcite cement ...

CONT

At the base, there is usually an abrupt change to massive pyrite from a footwall of nodular micrite, shale biomicrite and other limestone units of the Mudbank Limestone.

OBS

The major organism is often specified, e.g., brachiopod biomicrite ...

French

Domaine(s)
  • Pétrographie
  • Géochimie
  • Géologie
DEF

Calcaire similaire à la biosparite sauf que la calcite est plus abondante sous forme de microcristaux de type micrite que sous forme de cristaux de type spathite dans le ciment.

CONT

La famille des roches [allochimiques] peut, à son tour, se diviser en deux groupes d'après la nature du ciment. Nous aurons ainsi : I) À ciment de calcite spathique : [...] II) Avec matrice de calcite microcristalline : 1) avec [intraclastes] : Intramicrite [...] 2) avec oolithes : Oomicrite [...] 3) avec fossiles : Biomicrite [....] 4) avec «pellets» : Pelmicrite [...]

CONT

Biomicrite à pellets de type grainstone à packstone.

Key term(s)
  • calcaire organogène

Spanish

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