A proposed extension of Folk's (1959, 1962) textural classification of carbonate rocks

Abstract

The proposed extension to Folk's (1959, 1962) textural classification of carbonate rocks includes the following modifications: 1.) introduction of oncoids (Flugel, 1978, 1982) and extraclasts as two new groups of allochems. 2.) adjustment of the amount of individual components from 25% (Folk, 1959, 1962) to 20% (or 40% in the case of fossils/peloids) in order to integrate them into the rock name. 3.) incorporation of all the components into the rock name as long as they comprise >=20% (or >=40% in the case of fossils/peloids) of the rock.