Neogene stratigraphy and regional correlation of the Çeşme Peninsula, Western Anatolia, Turkey

Abstract

This study aims to investigate the stratigraphy and regional correlation of terrestrial Neogenesediments and volcanics in the Çeşme Peninsula. Neogene deposition is represented by two mainsedimentary successions separated from each other by an angular unconformity. The lacustrinedominated Çeşme group characterized the Lower-Middle Miocene deposition is formed by Şifne,Ovacık and Çiftlik formations. The felsic pyroclastics (Alaçatı pyroclastics), which are the earlyproducts of the Armağandağı volcanism, laterally associated with the Çeşme group deposition,deposited on the Şifne formation and interrupted the lacustrine sedimentation. The lacustrinesedimentation continued uninterruptedly with Ovacık and Çiftlik formations after the depositionof pyroclastics, which terminated the sedimentation of the Şifne formation. The calc-alkalineArmağandağı volcanism is composed of felsic pyroclastics, andesitic volcaniclastics (Reisderevolcaniclastics) and lavas (Zeytineli lava) respectively from bottom to top. The Late Miocene-Early(?) Pliocene Kaştepe group, which covers all these units with angular unconformity, is representedby a succession, which grades from alluvial fan (Karagöz formation) up to lacustrine deposits (İnliceformation).