Calcareous nannofossils biostratigraphy and Paleoclimatology of the Bekhme Formation, Bekhere anticline, Dhouk area, Kurdistan region, Northern Iraq

A Detailed Calcareous nannofossil study conducted on the Bekhme Formation that is cropped out at Southern limb of Bekhere anticline, eastern ward Dohuk city near Bajlur village, northern Iraq. The composed marly limestone, Organic limestone and fossiliferous limestone. nannopaleontological classification these calcareous nannofossils led us to determine thirty-four genus/species belonging nine families. nannobiostratigraphic analysis suggested three biozones from oldest youngest are: (1) Quadrum sissinghii Interval Zone; (2) trifidum (3) Tranolithus phacelosus Zone. These suggest studied section Middle Late Campanian, it refers temperature fluctuations which considered as possible warm time period subtropical areas.