Lithistid and hexactinellid sponges (lithistids prevail).
Height of mounds around 50 m, but up to 150 m.
Massive micrites according to ref. 1569.
Mound sequence is 250 m thick according to ref. 2180.
Lower mound interval with lyssakine sponges in association with Terebellan and Radiomura.
Middle mound interval with lyssakine sponges, non-rigid demosponges, calcareous sponges, Radiomura, Terebella, Dorsoserpula and minor thrombolites.
Bryozoans increasingly imporant up-section. Some serpulids. 
Several borings
Water depth estimated to be between 500 adn 1200 m.