40 m thick interval with several mounds.
Individual mounds up to 5 m thick and more than 10 m long.
Well developed cements.
Three types of bioconstructions:
- Gordonophyton-Razumovskia crusts supporting a cryptic community of coralomorphs, cribricyaths and archaeocyaths in shelter cavities.
- radiocyathan-archaeocyathan bioherms. 29 species of archaocyaths, 4 species of calcimicrobes, 2 problematic reef builders.
- calcimicrobial bioherms with Gordonophyton, Batinevia, Proaulopora and rafts of Razumovskia. Archaeocyaths as debris.
Should be plate 419.