Al-Khalaif, S. and Al- Mutwali, M. 2020. Biostratigraphy and Sequence Stratigraphy and Depositional Environment of Kolosh Formation in Dohuk Area, Northern Iraq. Iraqi National Journal of Earth Science (INJES). 20, 2 (Dec. 2020), 18–42. DOI:https://doi.org/10.33899/earth.2020.170362.