Relation between Walash Group and Kolosh Formation: a key to the stratigraphy of the Penjween area Kamal Haji Karim 1 and Bashdar Jalil Hamza Department of Geology, University of Sulaimani kamal.karim@univsul.edu.iq Introduction The Penjween area, including Shalair Valley, is a part of the northeast Iraq in the Kurdistan Region and it looks like crocodile head that extends toward northeast inside Iran for about 40 km and that (Fig.1). Tectonically, it is outer part of the Sanadij-Sirjan Zone (SSZ) and it was under intense geological studies sine the fifties of last century. The earlier studies such as [1] and Site Investigations Co. TD., 1960 are concerned with Iron ore exploration in the area. These two studies found small lenticular iron ore at the southwest of Penjween town inside Penjween Ophiolite Complex. While new ones focused on the tectonic, geochemistry and petrology of the ophiolite and volcanic rocks. [2] drew the first tectonic model of the Penjween area that consisted of three thrust sheets. While [3] modified it to three sheets, later [4] divided the area to five sheets, which comprised, from the top to the base, of Shalair phyllite, Walash volcanosedimentary Group, Ophiolite Complex and thrust sheets of Avroman and Qulqula Formations. Methodology On each location clast shape, possible mineralogies, grain caliber, sorting, beds-laminae thickness, erosional and depositional structures, bed forms and attitudes, and lateral beds extent are recorded in the field. When the uncertainty arises in certain bed or succession, we took suitable samples for thin section studies. The entire previous studied are reviewed and their field features and evidence are revisited to see whether contradict the results of our study or not. We achieved sedimentological observations and interpretations in tens of locations on the outcrops of the both Kata Rash Volcanics, and Penjween Ophiolite Complex and Walash Group and Kolosh Formation The 1 st International Conference for Natural Resources Research Center 95