Document Type : Research Paper
Department of Geology, Faculty of Sciences, University of Lorestan , Khorram Abad, Iran
Department of Geology, Faculty of Sciences, University of Shahid Behshti , Tehran, Iran
The Gurpi Formation, one of the geologycal units of the Zagros Basin, stretches with in the Folded Zagros in the provinces of Khuzestan, Lorestan, and Fars,in southwest Iran. In all 525 samples were collected from five stratigraphic sectiones of the Gurpi Formation in Dezful embayment Zone for studying biostratigraphy. Totally 47 species from 23 Planktonic foraminifera genera were recognized in this study. From a biochronostratigraphic point of view, eight of the identiﬁed biozones are typically restricted to the Late Santonian to Late Maastrichtian. To examine the paleoecology of the formation, some important ecological factors including water level, salinity, and oxygen regime changes during the depositional courses of the formation were analysed.