Abstract: The oldest unit exposed in the study area is the Gürgendağ Yayla formation of Liass-Dogger agecomprising of weatheret purble colored basalt, andesite and their pyroclastics. This formation is conformably overlainby pyroclastics. This formation is conformably overlain by massive and thick-bedded limestones of the Berdigaformation of Upper Jurassic-lower Cretaceous. The Berdiga formation is inturn unconformably overlain by the Düzköyformation of Campanian-Maastrichtian age wich consist of andesite, basalt and dacite lava and their pyroclastics. Thisformation grades upward in to white colored limestone and marl intercalations of the Tonya formation ofMaastrichtian-Danian age. The Foldere formation of Lutetian age consisting of andesite, basalt lava and pyroclasticswith sedimentary intercalations rests disconformably on the Tonya formation. All these units are disconformablyoverlain by the Karadağ formation of Mio-Pliocene age comprising olivine-augite basalt and its pyroclastics.