Geologicheskii Vestnik

On the territory of the Geopark Yangantau widespread bituminous marls and black shales compose Yangantau Formation of the Lower Permian. It is believed that these deposits are related to the phenomenon of underground combustion of rocks and the formation of hot steam used in the health treatment. Numerous underwater landslide structures in the form of folds and spherical forms (rolls and slumps) are observed in the sediments of the Formation; they can be studied in two sections — on the right bank of the Yuryuzan river in the area of the sanatorium and in the excavation of the road near Akhunovo village. Along with the characteristic lithological composition and high bituminousity of the rocks, they can be considered a diagnostic feature of the Formation. In the section near Akhunovo village the landslide structures are overprinted by a secondary folding and shear deformation, which creates the impression of a chaotic structure and intense tectonic disturbance.

created formation, lower Permian, Artinskian, bituminous marls, underwater-landslide folds

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