Kanevskaya Irina Dmitrievna RussiaTiraspolTransnistrian State University, department of general geography, City of Tiraspol, st. 25 October, 125senior teacherI.D.Kanevskaya@yandex.ru Author's articles Stratigraphic Significance of Gastropod and Improving of Local Stratigraphic Scheme of Sarmatian Deposits of Moldavian Transnistria and Neighboring Areas