Microfacies and Depositional Environment of the Interfingering Beds of Avanah Formation from Selected Sections, Sinjar Anticline, Northwest Iraq

Lithological studies of three surface sections of Jaddala Formation, Sinjar anticline, indicated the presence of Avanah Formation, this manifested by three interfingring beds in Sharafadden village section and two thin beds in Jaddala village section, while non is present in Bara village section. These interfingering beds are comprised of three microfacies : Nummulitic lime grainstone microfacies (A1), Bioclastic lime grainstone-ies (A2) and Alveolina lime wackestone microfacies (A3), their depositional environment extended from inner-middle-outer ramp zones.
The disappearance of interfingering from the western part of Sinjar anticline and it's presence in the eastern part, point to the deepening deepocenter during the Eocene of the Sinjar basin in westward direction of the studied area.