Intense dolomitisation.
Botryoidal surfaces surrounding colonies of Favosites, Heliolites. 
Stromatopores important in fore reef.
Tar-like substance in abundant vugs (not-commercial).
Reef without massive core.
Distinct zonation.
Crinoids, tabulate and rugose corals, stromatopores.
Microbe activity indicated by intense submarine cementation and binding.
Collection has data on trilobites only