Calcarenite is a type oflimestone that is composed predominantly (more than 50%) of detrital (transported)sand-size (0.0625 to 2 mm in diameter),carbonate grains. The grains consist of sand-size grains of eithercorals,shells,ooids,intraclasts,pellets, fragments of olderlimestones anddolomites, other carbonate grains, or some combination of these. Calcarenite is the carbonate equivalent of asandstone. The term calcarenite was originally proposed in 1903 byGrabau[1][2] as a part of hiscalcilutite, calcarenite andcalcirudite carbonate classification system based upon the size of the detrital grains composing a limestone.[3][4] Calcarenites can accumulate in a wide variety of marine and non-marine environments. They can consist of grains of carbonate that have accumulated either as coastal sanddunes (eolianites),beaches, offshore bars and shoals,turbidites, or other depositional settings.[3][5]
