Planktonic Foraminiferal Biostratigraphy of Shiranish Formation in Sara Anticline in Dokan Area, Northeastern Iraq

Abstract

Planktonic foraminiferal biostratigraphy of Shiranish Formation was studied in Sarah's anticline at the Dokan area, Sulaymania governate in, northeastern Iraq. The studied section consists of marl and marly limestone, Sixty-three Planktonic foraminiferal species belonging to seventeen genera have been recognized which permits the recognition of six zones; these are from older at the base 6- Abathomphalus mayaroensis interval zone (Part). 5- Gansserina gansseri interval zone. 4- Globotruncana aegyptiaca interval zone. 3-Globotruncanella havanensis interval zone. 2- Globotruncanita calcarata total range zone. 1-Globotruncana ventricosa interval zone (Part). The Planktonic foraminiferal zones were correlated with other zonal schemes in and outside Iraq. They are considered to be extending from Middle Campanian to Late Early Maastrichtian.