Biostratigraphy of the Oligocene deposits of Pabdeh Formation based on planktonic foraminifera in Bandar Abbas area

In this research, the biostratigraphy of Oligocene deposits of the Pabdeh Formation in Bandar Abbas region is considered. For this purpose, the planktonic foraminifera was studied and identified. Based on the index forms of these microfossils, biozones were recognized and compared to global biozonation. Investigation of the stratigraphic distribution of these microfossils in the four studied surface and subsurface sections (Champeh, Safid, Band-e Lengeh, and Taftan) led us to the identification of the Eocene/Oligocene boundary and four biozones of planktonic foraminifera (Zone E16, Hantkenina alabamensis Highest-occurrence Zone, Zone O1, Pseudohastigerina naguewichiensis Highest-occurrence Zone, Zone O2, Turborotalia ampliapertura Highest-occurrence Zone, Zone O3, Dentoglobigerina sellii Partial-range Zone) in this region. Based on the foraminiferal assemblages and their biozonation, the age of Oligocene deposits of the Pabdeh Formation is Rupelian. Also, the lateral extension of Oligocene deposits of the Pabdeh Formation in the studied area has been considered.