Initiated on oolitic sands.
Dominated by thrombolites. 
Common worm tubes.
Micro-encrusters: Claracrusta(?), Wetheredella, Aphralysia, Mitcheldeania, forams.
Common crinoid holdfasts, encrusting forams.
Abundant ramose bryozoans, syringoporoid corals, solitary and rugose corals.
Hard-substrate borings.