VAN GÖLÜ (TÜRKİYE) DOĞUSUNDAKİ ALT VE ORTA EOSEN YAŞLI KARBONATLI KAYAÇLARIN MİKROFASİYES ANALİZİ

Özet

A detailed study on the microfacies and depositional environments of Lower and Middle Eocene sedimentary rocks outcrop in Van Province (Turkey) were conducted. The investigation was based on sixty five samples collected from three stratigraphic sections and included Toprakkale and Yücelendere formations. These rock units are composed of carbonate rocks. The petrographic study of thin sections have been carried out to investigate their microfacies and depositional environments. The rocks are generally biomicrite. According to the characteristics of carbonate rock samples five microfacies were determined. These are; 1) Wackestone with Globigerina and Acarinina microfacies, 2) Wackestone-Packstone with Globigerina and Acarinina microfacies, 3) Packstone-Grainstone with Globigerina and Acarinina microfacies. 4) Grainstone with Milioliidae and Red Algae microfacies. 5) Packstone with Nummulites and Red Algae microfacies. These microfacies indicate that Lower-Middle Eocene rocks were formed in depositional environments ranging from shelf lagoon to deep marine. These differences in depositional environments have been interpreted as the result of changes in water level in relation to transgression and regression events.