Age determination and origin of crenulated limestone in the eastern part of Sulaimaniyah Area, Kurdistan Region, ne Iraq

Many outcrops of crenulated limestones are observed in eastern part of Sulaimaniyah area. These limestones are deformed into tight and/ or open mesoscopic folds, which are superimposed on larger-scale synclines or anticlines. The outcrops are discussed and the biostratigraphically is analyzed. The identified planktonic foraminifera indicated that these limestones belong to Kometan Formation and its age extends from Turonian to Late Campanian. The age determination depends on the index planktonic foraminifera; such as Marginotruncana sigali and Dicarinata imbricate indicate Turonian age, whereas Dicarinata primitivae indicate Coniacian age, Dicarinata asymmetrica, indicates Santonian age and Radotruncana calcarata indicates early Late Campanian age.