Abstract: Planktonic foraminifera İn the Lower-Middle Miocene turbiditic Cingöz Formation cropping outaround the Karaisalı-Çatalan-Eğner region have been recognized and determined for the first time in this study, Planktonic foraminifera occur in sequence identified as submarine fan deposits and some preliminary observations on the evolution of these submarine fans are also given. Fourteen planktonic foraminifera species have been identified and assignedto three biozones in this succession. The Lower Miocene is represented by Praeorbulina glomerosa curva Zone,while the Middle Miocene is marked by the Orbulina suturalis and Globorotalia mayeri Zones. This planctonie foraminifera biozones have been correlated with previous studies carried out in Turkey and some other regions of theworld. The Lower Miocene ostracods have also been defined in a few samples taken from the lower part of the CingözFonnation, which has a transitional contact with the shallow marine Kaplankaya Formation.