Boletín de la Sociedad Geológica Mexicana Volumen 72, núm. 2, A100619, 2020 http://dx.doi.org/10.18268/BSGM2020v72n3a100619

Late Devonian (Famennian) conodonts from Baqer-Abad section, northeast Isfahan province, Central Iran

Conodontos del Devónico tardío (Fameniano) de la sección Baqer-Abad, noreste de Isfahan, Irán central

Ali Bahrami^1,*, Ayesheh Parast¹, Iliana Boncheva², Mehdi Yazdi¹

¹ Department of Geology, Faculty of Sciences, University of Isfahan, Plaza Azadi, 81744, Isfahan, Iran.

² Geological Institute, Bulgarian Academy of Sciences, Bonchev st. bl.24,1113, Sofia, Bulgaria.

* Corresponding author: (A. Bahrami) This email address is being protected from spambots. You need JavaScript enabled to view it.

How to cite this article:

Bahrami, A., Parast, A., Boncheva, I., Yazdi, M., 2020, Late Devonian (Famennian) conodonts from Baqer-Abad section, northeast Isfahan province, Central Iran: Boletín de la Sociedad Geológica Mexicana, 72 (2), A100619. http://dx.doi.org/10.18268/BSGM2020v72n2a100619

Abstract

The Baqer-Abad section, northeast Isfahan Province, Central Iran has a thickness of 220 m representing mainly shallow-water palaeoenvironments with fossiliferous abundance and biodiversity. The zonal division in this section includes ten Famennian zones as follows, from the bottom to the top: triangularis Zone, crepida Zone, Lower rhomboidea Zone, gracilis–Lower marginifera interval Zone, Upper marginifera barren Zone, Uppermost marginifera–trachytera interval Zone, postera Zone, Lower expansa Zone, Middle expansa Zone, Upper expansa–praesulcata interval Zone. This section comprises the most complete biozonation of the Famennian stage in the area of northeast Isfahan in Central Iran. The analysis of the conodont associations and biofacies support the interpretation that these shallow-water habitats were still in platform conditions. Based on the conodont record, major stratigraphic gaps also occur at the end of Famennian, which confirms earlier results reported from other sections with similar palaeoenvironments in the North Isfahan area.

Keywords: Late Devonian, Famennian, Bahram Formation, Conodonts, Central Iran,Isfahan.