Reefal and biostromal beds up to 100 m thick.
Tabulates, rugosans, receptaculitids, stromatoporoids.
tabulates (Tollina, Rhabdotetradium, Catenipora, etc.), rugosans, receptaculitids and stromatoporoids, are said to be part of a shelf succession that extends to the O /S boundary (Oradovskaya, & Obut,1977; Oradovskaya,  in Ganelina & Ioganson, 1990).
Probably plate 485.