Microbiostratigraphy of the Cenomanian-Turonian boundary in east of the Kopeh-Dagh (Hamam Qale) section

The Upper Cenomanian–Lower Turonian deposits of Hamam-Qal’eh section (east Kopeh- Dagh) were studied based on foraminifera from biostratigraphic point of view. Based on the standard biozonation، three biozones for Upper Cenomanian–Lower Turonian deposits were differentiated in a 1m interval sampling (R. cushmani، W. archaeocretacea، H. helvetica). Whiteinela archaeocretacea zone was divided into three subzones. This recorded zonation conrms that the sedimentation was continuous at the Cenomanian-Turonian boundary.