Nannobiostratigrphy of shiranish formation in balad well no. 8, Northern Baghdad, Iraq

الملخص EN

Eight samples of Shiranish Formation were obtained from Balad well No.

8, (northern Baghdad) central Iraq.

Details investigated carried out identify calcareous nannofossils, where identified sixteen species; eleven descried from other region and five left under open name because of lack of material or rare of samples, On the basis of stratigraphic distribution of the species, two biozones proposed these are : 2- Reinhardites levis Interval Biozone(CC24) 1- Tranolithus phacelosus Interval Biozone(CC23b) The proposed biozones correlated with others calcareous nannofossils biozones from regional schemes led to conclusion that the age of Shiranish Formation in studied section Early Maastrichtian.