Biostratigraphy, microfacies and paleoenvionment ofthe Taleh Zang Formation in the North of Lorestan Zone

Authors

1 Ph. D., student. Dept., of Earth sciences, Islamic Azad University (IAU), Science and Research Branch, Tehran, Iran

2 Assoc. Prof., Dept., of Geology, Faculty of Science, Lorestan University, Khorramabad, Iran

3 Assist. Prof., Dept., of Earth sciences, Islamic Azad University (IAU), Science and Research Branch, Tehran, Iran

Abstract

in the north and east of the Lorestan basin. In this study, biostratigraphy, microfacies and paleoenvironment of the Taleh Zang Formation (Palganeh, 25; Pasan, 52 and Poshteh Jangal, 75 m thick) were investigated. Assemblages of larger foraminifera from Palganeh and Pasan sections can be referred to Zone SBZ 3 which correlates with the late Thanetian Stage. In view of the fact that we could not find any index microfossils in The Poshteh Jangal section, as to its stratigraphical position, we prefer an early Thanetian date (SBZ 3) for this section. The existing microfacies indicate an inner ramp environment for the Pelganeh and Poshteh Jangal sections and inner and middle shelf environments for the Pasan section. In addition, from the microfacies of the internal ramp, in the Poshteh Jangal section, only the microfacies of tidal flat and Lagoon are spread, but in the other two sections, in addition to these two microfacies, the microfacies of the open marine are also seen.

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History

  • Receive Date: 20 December 2022
  • Revise Date: 25 February 2023
  • Accept Date: 05 March 2023

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