Document Type : Original Research Paper
Authors
1 Associate Professor, Department of Geology, Faculty of Earth Sciences, Kharazmi University, Tehran, Iran
2 M. Sc., Department of Geology, Faculty of Earth Sciences, Kharazmi University, Tehran. Iran
3 Assistant Professor, Research Institute of Petroleum Industry, Tehran, Iran
Abstract
Two stratigraphic sections of Tang-e-Chenarbashi (712 meters) and Tang-e-Bavolak (870 meters) in the Kabir kuh anticline were selected for investigating planktonic foraminiferal biostratigraphy of the Sarvak Formation. These sections encompass of pelagic facies and containing rich microfauna of Middle Albian to Cenomanian. The results of this study show the age of Middle Albian for lower strata of the Sarvak Formation. First appearance of Biticinella breggiensis correspond with the onset of Upper Albian strata, and is a cosmopolitan marker for Middle and Late Albian boundary. Also, based on investigated biozones including Ticinella roberti Zone, Ticinella primula Zone, Biticinella breggiensis Zone, Rotalipora ticinensis Zone, Paracostellagerina libyca zone, Microhedbergella rischi zone, Rotalipora cushmani Zone,Whiteinella archaeocretacea Zone, several paraconformities have been recognized in the examined sections.
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