Mixed carbonate-siliciclastic shelf setting.

Individual bioherms less than 2 m thick and wide. 
Upsection coalesced to form up to 15 m thick complexes.
Surrounded by grainstones with little archaeocyath debris.

Four types of reef buildups:
Calcimicrobe boundstones
Calcimicrobe bafflestones
Radiocyath-archaeocyath-cribricyath bioherms

Archaeocyaths form up to 20 % of rock volume. 12 species.

1 Radiocyath species

10 calcimicrobe species.