Stratigraphy, Sedimentology and Palynology of the Neogene-Pleistocene(?) Rocks Around Akçaşehir- Tire-İzmir (Küçük Menderes Graben, Western Anatolia)

Authors: TAHİR EMRE, METİN TAVLAN, MEHMET SERKAN AKKİRAZ, İSMAİL İŞİNTEK

Abstract: The basement rocks located in the central part of the southern edge of the Küçük Menderes Graben, around Akçaşehir-Tire are composed of marbles, schists, gneisses and metagabbros of the Ödemiş-Kiraz submassif of the Menderes Massif, and schists, marbles and meta-olistostromes of the Cycladic Complex. The basement is unconformably overlain by Neogene-Quaternary continental sediments. These continental basin fills are comprised of the Ayaklıkırı Formation, the Aydoğdu Formation and alluvium that unconformably overlies them. The Lower-Upper Miocene Ayaklıkırı Formation consists of lacustrine and fluvial deposits. The Plio-Pleistocene (?) Aydoğdu Formation is made up of alluvial fan deposits. Vast plains of alluvium cover the youngest formations. The lowest part of the Ayaklıkırı Formation is represented by terrestrial to very shallow lake environments, represented by silts, clays, laminated micritic carbonates, ostracod-bearing laminated algal, microbial and peloidal microbial carbonates, algal carbonate crusts and pebbly, sandy, clayey, micritic carbonates. Palynological data collected from coal beds around Akçaşehir-Tire shows that the Ayaklıkırı Formation was deposited during the latest Early Miocene-earliest Late Miocene. Palynological data and some gastropoda taxa such as Planorbis sp. and Limnea sp. indicate that the Ayaklıkırı Formation was deposited in a lacustrine environment. Palaeoclimatic results indicate a warm temperate to humid climate preceding the Middle Miocene Climatic Optimum.

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