Mountain limestone.Siliceous schists.
Productus-limestone with large, thick-shelled species of Productus.
Spirifer-limestone with gypsum. Many Spiriferi, some of them of colossal size.
Cyathophyllum-bearing limestone and dolomite.
Sandstone with intercalated coal and clay-shale. Contains the plants.
Russian-island limestone. Greyish yellow dolomite with beds of calcareous shales.
Red Devonian (?) shales.