Buildup mainly composed of trepostomatous bryozoans. 30 m thick.
Two facies: mud rich wacke-packstone, bryozoan packstone
Basal zone with diverse rugose and tabulate corals, crinoids and bryozoans.
Bulk facies with encrusting and foliaceous bryozoans with abundant algae and forams.
Capping unit with encrusting bryozoans and rugose corals.