Analysis of the Knowledge of the Callovian Type Sections from the Volga Region

Comparison of results obtained by various authors from Callovian beds of the stratotype section in the Malinovyj gully has shown to be incomparable in the amount and quality of biostratigraphic information. Using this information for recognizing of local strata (suites) has reduced the minuteness of deposit division. This makes new comprehensive description of the section essential as well as thorough analyses of the latest results in combination with the earlier data on the updated ammonite standard.