Krokhmal' O. Small mammals and Stratigraphy of Lower and Middle Neo-Pleistocene of the northwestern part of Russian Platform

The dissertation is devoted to problems of stratigraphical subdivision and correlation of ancient Euxinic sediments of the coastal zone of the northwestern part of the Black Sea using fossil fauna of small mammals. In this study the task of detail morphological characterization of the structure of first lower molars surface of Microtinae has been applied at the first time (morphometrical analysis, distribution of morphotypes, differentiation of enamel). The faunistic complexes and terio-associations have been estalished. On the basis of these data the stratification of the sediments characterized by ancient Euxinic type of fauna has been carried out and three stages of the basin evolution have been recognized. The correlation of ancient Euxinic sediments with ones of different genetic types for more than 80 sites in Europe was made.