Western margin of Guilin platform.
Coral bafflestone reef behind an algal-stromatoporoid platform margin reef. Composed exclusively of rugose coral Smithiphyllum ( 3 species). Brachiopods as dwellers. Some solenoporacean fragments. 
-> Collection of Miller

Coral bioherm (Smithiphyllum) 8 m thick and 30 m wide. Base is Stromatactis limestone, top is peloidal packstone followed by receptaculid-algal limestone.

Ref:. 1866:
Reef complex with 
'Algal'-stromatoporoid reef
receptaculid-algal reef
Smithiphyllum bioherm
algal mounds

30 m exposed thickness.
Lateral differentiation into back-reef, reef flat and margin, margina fore-slope.
Stachyodes most abundant in reef flat.
Calcimicrobes prevail in reef-slope: Renalcis, Epiphyton, Rothpletzella
Cavities and veins filled with radiaxial-fibrous calcites