Micrite is a limestone constituent formed of calcareous particles ranging in diameter up to four 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 derived from MICRocrystalline calcITE.

Micrite is fine-grained lime mud made of clay-sized crystals of microcrystalline calcium carbonate. Its analogous to the matrix in a sandstone in that its present at the moment of deposition. Micrite is most commonly formed from particles derived from algae or microfossils.

micrite, 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.

2024年4月11日 · Micrite. Micrite is a limestone formed of calcareous (composed of calcite) particles ranging in diameter up to four microns. It is formed by the recrystallization of calcareous mud.

2000年7月18日 · Micrite is one of the most common carbonate rocks. Most of what people call " limestone" is largely or exclusively micrite. As with clay (shale) it is deposited in generally quiet water, and appears in any environment where those conditions exist.

Some micrites may have originated when calcium carbonate precipitated as tiny grains in the water column and settled to the sea floor. Here is your basic micrite. This particular sample is from a limestone that formed in an ancient lake. It formed from a soft lime mud originally made of tiny grains of CaCO 3. Many dolostones are micritic.

2019年9月4日 · Folk extended this basic classification to include the percentages of micrite and spar cement (diagram below). The cut-off percentage between pure micrite and a micrite with allochems is 1%, 1-10% skeletal fragments is a fossiliferous micrite, 10-50% a sparse biomocrite, and >50% a packed biomicrite. Other qualifiers like pelloids and ooids use ...

2000年10月26日 · Micrite is "lime mud", the dense, dull-looking sediment made of clay sized crystals of CaCO 3. Much micrite today forms from the breakdown of calcareous algae skeletons. It is not clear if all ancient micrites formed in the same way. Many carbonates are composed of nearly 100% micrite. Such rocks are simply called micrites.

A large volume of any limestone is usually composed of carbonate mud or micrite. Because of the small size of the grains or crystals in the micrite, identification of their origin is difficult to impossible.

Micrite is a textural term for microcrystalline carbonates less that 4 μm in size. The term “micrite” is a contraction of the words “microcrystalline calcite” and was introduced by Folk (1959, p. 8) as an aid in the classification of limestones. Initially, Folk applied the term to microcrystalline calcite ooze in the size range of 1–4 μm.