THE OSTRACODA BIO STRATIGRAPHY AND ENVIRONMENTAL INTERPRETATION OF THE MONTIAN-CUISIAN SEQUENCE IN THE SOUTH OF POLATLI (SW ANKARA)

Abstract

In the present study, the ostracoda fauna of the sedimentary rocks of Lower Paleogene situated in south of the Polath Town have been stratigraphicaly examined, its biozones have been distinguished and the findings are interpreted from the cronostratigraphic and environmental point of view. By evoluating the stratigraphic distribution of 44 ostracoda species, the existance of 4 biozones in Montian—Cuisian have been proposed. It is interpreted that the Tertiary sequence of the region was first deposited in a continental and then in a marine environment.