Biostrome in shallow-water platform. A diverse set of microfacies have been observed in thin sections. The most abundant one is rudstone; bindstone and packstone are also common. More rarely, grainstone occur, mainly in the upper part of the bed. The identified components are the same as those occurring as macrofauna, plus foraminifers, calcareous algae, ostracods and scarce fragments of molluscs. Frequently, there is recorded the intergrowth of gigantoproductid brachiopods, rugose corals and chaetetid sponges.