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ALLOCHEM

Allochem

Identifiable grains in carbonate rocks

The term Allochem was introduced by sedimentary petrologist Robert L. Folk as part of his petrographic classification of limestones to describe the recognizable

Allochem

Micrite

Limestone formed of calcareous particles

addition to allochems are named intramicrite, oomicrite, biomicrite or pelmicrite under the Folk classification depending on the dominant allochem. Micrite

Micrite

Limestone

Type of sedimentary rock

carbonate rocks. Based on composition, there are three main components: allochems (grains), matrix (mostly micrite), and cement (sparite). The Folk system

Limestone

Peloid (geology)

Peloids are allochems that are composed of micrite, irrespective of size, shape, or origin. The two primary types of peloids are pellets and intraclasts

Peloid (geology)

Peloid_(geology)

Pellets (petrology)

Form of carbonate sedimentary structure

strict sense, are fecal products of invertebrate organisms. Peloids are allochems of any size, structure, or origin. As a result, peloids not only include

Pellets (petrology)

Pellets_(petrology)

Matrix-supported rock

fine-grained matrix as opposed to the clasts (in the case of a conglomerate) or allochems (in the case of a limestone). For a conglomerate, a rock is considered

Matrix-supported rock

Matrix-supported_rock

Induan

First age of the Early Triassic epoch

calcimicrite. Calcimicrite is a type of limestone that contains more micrite than allochem, and the diameter of any particle measures less than 20 microns. The Induan

Induan

Folk classification

Sedimentary rock classification

Folk's carbonate rock classification details the relative proportions of allochems in the rock and the type of matrix. The classification scheme covers most

Folk classification

Folk_classification

Online names & meanings

Elston

Surname or Lastname

English

Elston

English : habitational name from any of various places so named. One in Lancashire is named from the Old English female personal name Ã†{dh}elsige (composed of the elements a{dh}el â€˜nobleâ€™ + sige â€˜victoryâ€™) + Old English tÅ«n â€˜enclosureâ€™, â€˜settlementâ€™; one in Nottinghamshire originally had as its first element the genitive case of the Old Norse byname EilÃfr meaning â€˜everlastingâ€™; one in Wiltshire was so named from Elias Giffard, holder of the manor in the 12th century.