Uppermost Lucas Dolostone.
Restricted peritidal to subtidal mudflats.
Bioherm 1.5 m thick and 15 m wide.
Bioherm and biostromes dominated by stromatoporoids:
12 species:
Syringostroma cyclindircum
S. Densum
S. nodulatum
S. pustulosum
Harbostroma(?) beachvillensis
H. larocquei
H. marpleae
Anostylostrom laxum
A. solumnare
Pseudoactinodictyon stearni
P. vagans
Clathrodictyon confertum
Zonation by changing stromat. growth forms (Three zones).
