coquinite

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coquina — /koh kee neuh/, n. 1. Also called pompano, butterfly shell clam. a small clam, Donax variabilis, abundant in the intertidal zone of eastern and southern U.S. coastal beaches, having fanlike bands of various hues, the paired empty shells often… … Universalium
micrite — ▪ rock 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. The particles, which consist of fossil materials, pebbles and … Universalium

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