Lower part of boissieri zone of the Berriasian.
Small bioherms (3-5 m thick, 4 m wide) of hermatypic corals and algae. Maximum 6 m thick.
Intermound areas filled with bioclastic grainstones and packstones with fragments of corals and others. 
Framework of massive colonial (massive platy and pacheloid/ramose) corals and Lithocodium. 

Abstract ref. 1764:
A section of Berriasian deposits from the River Belbek area (Southwestern Crimea) containing coral-algal bioherms is described. A detailed lithological and palaeontological description of one of these bioherms is given. Lithological features of Berriasian carbonate rocks are discussed, microfacies analysis of these rocks with there palaeontological remains are carried out. The history of the Berriasian development of the territory will be reconstructed.