Calcisponges, Rhabdactinia and tabulozoans as main reef builders.
Occuring at margin of intraplatform basin.
Abundant sponge spicules in surrounging facies indicate deeper water than at 223.

Comments from Tian & Wang, 2021: 
Reef builders: 
Frame-building and baffling organisms: hypercalcified sphinctozoan and inozoan sponges, sclerosponges, stromatoporoid sponge, bryozoans, and hydrozoans.
Binding organisms: Archaeolithoporella, Tubiphytes, and cyanobacteria.

Reef dwellers:
Echinoderms, ammonites, bivalves, brachiopods, gastropods, benthic foraminifera, calcareous algae, and single rugose corals.

Rock type and reef-related depositional characteristic:
Fore-reef slope:
spiculitic-calcispherical--
cherty wackestone with reef
breccias
Reef core: sponge framestone and bafflestone, Archaeolithoporella and cyanobacteria bindstone, and sponge framestone with the encrusting Archaeolithoporella
Reef flat (reef crest): packstone with reef breccia
Reef base: echinodermal packstone to grainstone
Back-reef lagoon: bioclastic packstone with calcareous algae, gastropods, and foraminifers.

Reef type:
Metazoan reef at the shallow carbonate platform margin.





