Sedimentary Cycles and Microfacies Analysis of Lower Miocene Formations in Sinjar and Sharafaddin Areas, NW Iraq.


Two surface sections of Lower Miocene rocks were studied in Sinjar and Sharafaddin areas NW Iraq. Four formations were recognized (Ibrahim, Hamrin, Serikagni and Euphrates Formations) embracing five microfacies and one lithofacies. Their depositional environment and the recognition of unconformable surfaces elucidated the presence of two sedimentary cycles. The stratigraphic distribution of the planktic foraminifera in Sinjar section permits the recognition of three biozones, which are assigned to Early Miocene age