Higher algae almost absent.
Esentially sponge-tubiphytes bioherm
Lithistids (Gilletia-type) together with abundant Tubiphytes, and subordinate sclerosponges and nodular stromatoporoids (Ellipsactinia, Sphaeractinia) developed on a deep shelf margin, accompanied by lenticulinid and trocholinid foraminifers. The sponge mound organisms have Tethyan affinities.