allochem

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• allochem — allochem,   allochemisch [griechisch], Petrologie: Metamorphose …   Universal-Lexikon

• Allochems — Allochem is a term introduced by Folk (1959) to describe the recognisable grains in carbonate rocks. Any fragment from around ½mm upwards in size may be considered an allochem. Examples would include ooids, peloids, oncolites, fossil or pre… …   Wikipedia