https://iaeme.com/Home/journal/IJARET 511 editor@iaeme.com International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 12, Issue 4, April 2021, pp. 511-517, Article ID: IJARET_12_04_049 Available online at https://iaeme.com/Home/issue/IJARET?Volume=12&Issue=4 ISSN Print: 0976-6480 and ISSN Online: 0976-6499 https://doi.org/10.34218/IJARET.12.4.2021.049 © IAEME Publication Scopus Indexed NANNOFOSSIL BIOSTRATIGRAPHY AND PALEOENVIRONMENTS OF THE PALEOGENE PATALA FORMATION AND NAMMAL FORMATION, KOHAT-POTWAR AREA, PAKISTAN Sara Sikander Khan 1* , Dr. Kamran Mirza 2 , Rabia Imtiaz 3 , Laraib Riaz 4 , Jabir Nazir 5 , Beenish Ali 6 *1 Institute of Geology, University of Punjab, Lahore, Pakistan. 2 Institute of Geology, University of Punjab, Lahore, Pakistan. 3 Institute of Geology, University of Punjab, Lahore. Geological Survey of Pakistan, Pakistan 4 Government Post Graduate College for Women, University of Sargodha, Sargodha, Pakistan. 5 G-SAG Lab, National Center of Excellence in Geology, University of Peshawar, Pakistan. 6 Bacha Khan University, Charsadda, Pakistan *Corresponding Author ABSTRACT Nannofossils are extensively dispersed in marine rocks from Jurassic to Recent time. They are primary biostratigraphic age indicators of marine sedimentary rocks. Calcareous nannofossils provide outstanding mapping tools for both surface and subsurface rock units especially in the areas where complex facies patterns are displayed in lithological units and are important tools in determining depositional paleoenvironments. In Pakistan few scientists had worked on nannofossils of this area. Haq (1971) examined Paleogene Calcareous Nannofossils from the Salt Range and the Sulaiman Range in Pakistan. Köthe et.al. (1988) examined calcareous nannofossils from the Salt Range, the Surghar Range and the Sulaiman Range. Paleogene rocks are well exposed throughout the Kohat-Potwar province of Pakistan, except in the Khisor Marwat Ranges, South Western part of the basin. In Kohat-Potwar area of Pakistan, the Patala Formation and the Nammal Formation of Paleogene age are rich in nannofossils and both rocks have a good potential for hydrocarbon resources. The Patala Formation acts as source rock and Nammal formation acts as reservoir rock for hydrocarbons. These formations are widely distributed in the Salt Range and Trans Indus ranges in the south, in Hazara (except Nammal formation). These areas are easily accessible, lithologic sections were measured and samples were collected for detailed nannofossil biostratigraphy.