The second stage of the study of massifs began after the discovery of oil in the Southern Ural. The similarity of Shakhtau and the buried oil and gas bearing arrays made him turn to many stratigraphs. During the war years, geologists from the Bashkir oil expedition of the USSR Academy of Sciences repeatedly turned to shihan to find out the features of the facies and the history of the formation of oil and gas bearing burials of massifs Ishimbayskoye Priuralie.