ABSTBACT: İn Körlü (Tarsus-Memn) region, the sedimeııts of Neogene ag#, uncomtfownaMy laveDlle the sediments of Upper Paleogene age. These sedjment®, hmmg 280 maters of totol tWetoess/ are divMed in to three FormattTOs, which contain the mollusc fauna of the Tethys basto and are named, from bottom to top as follows : — Karaisalı Formation (Burdigalian) — Kuzgun Formation (Tortonian) — Memîşlî Formation (Messinian) The rich marine mollusc fauna such as t Conus (Cheiyconus) pyrula Brocchî var, mucromata Erentöz, W&B Strombus (Strombus) coronatus (Defrance in Basterot), 182^ CrasEOstrea gryi>hoides (Schlothelm), 1818 are well developped M Tortonian age. It is accepted that, starting from the Late Tortonian age, the marune properties of the region have been disappeared by the first oeeurence of Pirenella picta in töne. These Forinatlons are overlain by the continental sediments of PMoeene age.