ABSTRACT: Until now, in previous studies, Besni Fërmafion, which constitutes a characteristic fitosttsatigraphical unit of the Upper Greaceoiis-Ijasen. aged sedimentary secpieiifie öf Southeast Anatolia^ has bee» :èescrïfee*l as a leefal Hnnesfone ooncordontfy developed with Antak andı Gesmav formations. It has been again, said that; the Antak and Gennav formations follow each-otfaer wîthont ittterftngroing- ami. An-" tak, Besnii ani Gennav formations wllefe ^cûnsfitato^ the lower part: of the sedimentary sequence aro always see» in the same stral%iaphlcal order to tine area.,, To- the .Northwest AUdami (ICalita-JLiiyaiBaii) however, it is abservedl that AnÉak and .Besai fO`rmaMons^ eadhite an interfingerJng1 stratigrapMbal devApmemt andf place, Antak Formatio-n İla ooocordant^f oveilaln toy the Gennav Formation as different from the sofar known»