Marine cement important.
Mostly wackestone with  ramose bryozoans.
Encrusting bryozoans locally common. Other fossils are pelmatozoans, brachiopods, trilobites, Girvanella and sponge spicules.
250 m thick, 20 km wide.
Downslope buildup.
All buildups of this type similar to Waulsortian mud mounds in dominance of carbonate mud, low content of frame builders, presence of baffling organisms abundant stromatactis and echinoderm flank beds.
High energy setting for mounds, but surrounded by deep ramp shaly limestone (sometimes anoxic).
Fibrous and blocky cements up to 18 %.
