Oligocene and Miocene Rock Beds in Mamlaha anticline, Chamchamal town, Sulaimani city- Kurdistan region/ Iraq


  • Soran O. A. Kharajiany School of Art, Ceramic Materials, University of Sulaimani, Kurdistan Region, Iraq. Author
  • Fouad M. Qader School of Science, Geology, University of Sulaimani, Kurdistan Region, Iraq. Author
  • Salim H. Hakkari School of Science, Geology, University of Sulaimani, Kurdistan Region, Iraq. Author
  • Hero G. Sharbazheri School of Science, Geology, University of Sulaimani, Kurdistan Region, Iraq. Author




Archias kirkukensis, Austrotrilina howchini, Mamlaha, Oligocene- Miocene, Kirkuk, Group Formations, Chamchamal, Kurdistan Region


Previously, the Oligocene rock beds in the Mamlaha anticline have neither mentioned nor proved. There are some selected sections that detected during field surveys but did not verified weather belong to Oligocene- Miocene ages or not. Through this research, it is proved that they are composed of Oligocene and Miocene rock strata. They are well-known as excellent rock reservoirs for hydrocarbon accumulation in Kurdistan region and Iraq as a whole. Field survey and stratigraphic study with microfacies analysis showed that nearly 37 meter of the rock units from Mamlaha anticline (Mamlaha, Khwelin and Pungala sections) are representing these formations; Bajwan Formation (Middle Oligocene), Anah and Ibrahim formations (Late Oligocene) ages, Serikagni, Euphrates and Dhiban formations (Early Miocene) and Jeribe Formation (Middle Miocene) ages respectively. The contact between Bajwan and Anah is unconformable; the Lower contact of Bajwan Formation is not exposed in each of the section. Ibrahim Formation however not exposed as well beds of marly limestone; it shows as pocket of marly limestone, but it sandwiched between Bajwan and Anah formations and shows no clear boundary. The upper contact of Anah Formation is separated from Euphrates Formation by 2 meters of green marl which indicates abrupt change in the lithology. The upper contact of Euphrates shows unconformity, while Dhiban Formation is unconformably underneath the marly sandy bituminous limestone of Jeribe Formation; Jeribe Formation is also unconformably lies beneath the claystone of Fatha Formation.


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How to Cite

Oligocene and Miocene Rock Beds in Mamlaha anticline, Chamchamal town, Sulaimani city- Kurdistan region/ Iraq. (2014). Journal of Zankoy Sulaimani - Part A, 16(2), 71-95. https://doi.org/10.17656/jzs.10295