Neogene stratigraphy and Gastropoda-Pelecypoda fauna of Gülpınar surruondings (Northwest-Anatolia)

In this study, the stratigraphical and pleogeographical properties of Neogene sediments of Gülpınar area, have been studied by using Gastropoda-Pelecypoda fauna. In the study area 12 stratigraphic sections have mesumed and 7 genus and 4 species belonging to Gastropoda and 11 genus, 10 species belonging to Pelecypoda are determined from these sections. From the bottom to the top; Aktschagylian=Early Kualnikian, Upper Kualnikian and Calabrian stages have been distinguished from the stratigraphic level of the fauna. In the study area, Aktschagylian=Early Kualnikian aged fauna are competable brackish water (salinity: % 0.16,5-0.30) and show similar characteristic Caspic and Euxinic Basins. The study area has became marine character the result of progressing of the Mediterranean sea during Calabrian. Keywords: Neogene, Gastropoda, Pelecypoda, Aktschagylian, Kualnikian Calabrian, Caspic Basen, Mediterranean