Coral-algal boundstone facies up to 12 m thick.
Encrusting and rare branching corals (Actinacis rollei >> Plocophyllia bartai = Cereiphyllia tenuis > Astreopora tecta). 
Diverse coralline algae (Mesophyllum, Lithoporella (23 %), Spongites (20 %), Neogoniolithon). Larger forams and bryozoans also common.
Up to 70 % of Matrix.
Surrounded by well bedded packstones and algal crust-branch rudstones.