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Folks Classification

Allochem (Grains) occur either floating In microcrystalline matrix (micrite), or packed

Together and cemented with calcite (spar).

Analogies: Sandstones Limestones Quartz.........................Grains Clay ............................Micrite Cement .......................Cement Prefix of Rock Name denotes kind of grain: bio ..........fossil intra ........intraclasts (soft sediment Pebbles) pel...........pellets (faecal in origin) o............olites Suffix denotes interstitial material (i.e., micrite or spar)

biomicrite biosparite

omicrite osparite

intramicrite intrasparite

pelmicrite pelsparite