Izvestiya of Saratov University.
ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)


elasmobranchs

On the Stratigraphic Significance of Elasmobranchs (Chondrichtyes, Elasmobranchii)) in the Cenomanian of the Volga River Basin (Right Bank)

The paper analyzes the stratigraphic distribution of elasmobranchs in the deposits of the Melovatka Formation (Cenomanian) from the right bank of the Volga (part of the Penza, Saratov and Volgograd regions).

The Santonian Stage in Volsk-Khvalynsk Structural Zone. Paper 1. The Research History and the Composition of Sections

The horizon enriched in glauconite and phosphorite was revealed at the carbonatic outcrops near Volsk in the Coniacian and Campanian stage deposits. The short descriptions of studying sections are presented. The spread of synchronous deposits within Khvalynsky district was traced. The Lower and Upper Santonian and the Campanian age deposits are proved by the presence of the inoceramids, belemnites and echinoides. Its vertical distribution was traced.