Bioherms are 30 cm to 1.5 m high and range from club-shaped heads 30 cm to 2 m in diameter to coalescent forms 10 m wide. Bioherms consist of branching digitate stromatolite columns (1 cm wide, 2 to 4 cm high), lesser sponge and calcareous algae, and interstitial carbonate mudstone and skeletal wackestone.

Bioherms overlie flat-pebble breccias that are underlain by ripple-laminated shaly-pellet limestone and interbedded breccia lenses and sheets. Shaly limestones locally overlie fossiliferous marine shale. Bioherms are overlain by ripple-laminated shaly-pellet limestone that also fills interbioherm depressions, and locally by ooid grainstone sheets (up to 8 m thick).