Reef belt from Kagul through Kishinev-Kamenka to Ledichev.
Bryozoans predominate:
Membranipora lapidosa, Nitscheina kischinewensis, Schizoporella eichwaldi, S. tetes, S. variabilis, S. mariae...
Algae: Lithophyllum ucrainicum, Melobesia badjii, Jania dnestrovica...
Others are bivalves and serpulids.

Base of buildups are bryozoan limestones, middle part with bryozoan-algae-foram (Nubecularia) limestones, upper part with algae-Nubecularia limestone.