calcirudite

Century Dictionary and Cyclopedia

1. n. In petrography, a term proposed by A. W. Grabau (1903) for a limestone or dolomite composed of broken or worn fragments of coral or shells or of limestone fragments, the interstices filled with lime-sand or mud and with a lime cement. It corresponds to psephite among the silicious rocks. Calcirudites embrace rocks known as coral-, shell-, or limestone-breccia and conglomerate.