fluvio-deltaic sequence of the Denizli Basin (SW Turkey)

The late Pliocene-early Pleistocene Tosunlar succession (Denizli Basin, southwestern Turkey) represents fluvial-dominated delta environments at the margins of a brackish long-lived lake. Two main facies associations are documented: (i) a delta front facies association, with a distal (DF1) and proximal (DF2) deposits; and (ii) a delta plain facies association that contains distributary channel (DPI) and interdistributary swamp (DP2) deposits.The stable isotopic analysis of the mollusc faunas exhibit a narrow range of values (-4.68 < delta O-18 < + 021%. and + 0.43 < delta C-13 < +3.27%., respectively) and the very poor delta O-18-delta C-13 correlation (r = -0.16) may indicate hydrologically open lake and significant diagenetic alteration. The mollusc faunas and their stable isotope ratios show a biogeographically isolated brackish lake system under semiarid climatic conditions. Under special environmental conditions the endemic faunal composition remained constant which is very unusual for a (semi-) isolated long-lived lake setting. (C) 2015 Elsevier B.V. All rights reserved