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ABSTRACT
This study reconsiders the previous biostratigraphic settings for the Asmari Formation in the eastern Zagros Basin (Fars Basin). The results imply that the Rupelian is identified by the total range zone of the Nummulites species (N. vascus, N. fichteli, N. intermedius). The occurrence of Archaias kirkukensis, A. hensoni, and A. asmaricus before the disappearance of Nummulites species in the current study and even the co-occurrence of the A. hensoni with the mentioned species prevents the use of recently proposed regional stratigraphical framework. The lower part of the Asmari Formation remains without certain age until the occurrence of larger benthic foraminifera throughout the Asmari platform. The coeval biozones for the Chattian Stage are Biozone 59, Biozone 2(b), Archaias asmaricus-A. hensoni-Miogypsinoides complanatus Assemblage Zone, and a part of Assemblage Zone 7 as named by the previous studies. In this study species like Archaias, Austrotrillina, Borelis and Peneroplis are not useful for discriminating the Rupelian and Chattian stages.
Acknowledgments
The author deeply thanks her anonymous colleague, whose suggestions and guidance have promoted the results of this paper. Prof. Dmitry A. Ruban (Moscow State University of Technologies, Russia) are also acknowledged for improving the English language of the text. Author deeply appreciates the time and efforts editor of the Journal of Historical Biology and reviewers devoted during the evaluation of this manuscript.
The author would like to thank the Shiraz University (Iran) research council for providing financial support.
Disclosure of potential conflicts of interest
No potential conflict of interest was reported by the author(s).
Supplementary material
Supplemental data for this article can be accessed here.