Outcrops of rudist-bearing shallow water carbonates. Weakly cemented, circular, flat-topped radiolitid–caprinid–toucasid mounds developed above the toucasid mounds and low relief, often sucrosic-dolomitized mounds.
Low diversity, with each biohermal stage being composed
of one dominant species—caprinids, toucasids, or caprinid–toucasid–
radiolitids, respectively.