Mavrin Konstantin Alekseevich RussiaSaratovSaratov State University, 83, Astrakhanskaya Str., Saratov, 410012, RussiaprofessorDoctor of Geologo-Mineralogical SciencesKAM-1934@rambler.ru Author's articles Terminal Permian Ichthyofauna from the Vicinity of Viazniki Town, Vladimir Province Kinds of «Fluid – Massive Material» Interference in Process of Evolution of Geohydrodynamic Systems of Aqueous-rocky Draws Hydrogeodynamic Conditions of the Basic Oil-gas-waterbearing Complexes of the Volga-Ural Province