•The Second Formation is distinct in its cyclic structure and high content of carbonates. The section contains three argillaceous-carbonate members: at the bottom, in the middle, and at the top. These members are separated by two members of sandy-argillaceous rocks. The argillaceous-carbonate members are composed of greenish and pinkish-grey dolomites, argillaceous limestones and marls (0.2-1.5m thick), containing thin (usually 10-30cm) bands of red shales. The sandy-argillaceous members are composed of reddish-brown shales and siltstones with lenticular interbeds of brownish sandstones (up to 2m)/

•Fossils are represented by non-marine ostracods, bivalves, fishes, amphibians and plants. The bed of the greenish-grey siltstone (5-20cm), 6.5m above the base of the formation, contains numerous scales of fishes. The large (0.5-3.0cm) reddish-brown scales occur parallel to the bedding planes and mainly concentrate in the thin (3-5mm) bed, which also yields small amphibian bones.

•Eight metres below the top of the formation, the bed (0.1m) of reddish-brown evenly and thinly laminated shales contains molds of ostracods, scales of fish, and plant remains." (Nurgaliev et al. 2015)