Early Serpukhovian
15-20 m thick, 50 m lateral extension.
Type I thrombolitic mounds with about 3 m synoptic relief.
Interfingering with oolitic and bioclastic grainstones.
Reticulate framework and encrusted metazoans.
Thrombolites-encrusting bryozoans-fenestrate bryozoans (Archimedes dominant)-encrusting forams-spicular alga as main mound builders.
Tyrpanites and acrothoracican barnacle borings according to ref. 1517.