Biostratigraphy of larger foraminifera from the Middle Eocene Jahrum-Pabdeh formations (Zagros region, SW Iran) and their correlation with the planktonic foraminiferal zones

Forouzande S. K., Hadi M., Vahidinia M., Consorti L., Salahi M. A., Gharaie M. H. M., ...More

Micropaleontology, vol.69, no.4-5, pp.481-508, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 69 Issue: 4-5
  • Publication Date: 2023
  • Doi Number: 10.47894/mpal.69.4.05
  • Journal Name: Micropaleontology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Artic & Antarctic Regions, BIOSIS
  • Page Numbers: pp.481-508
  • Keywords: Biostratigraphy, larger benthic foraminifera, Middle Eocene, planktonic foraminifera, Zagros region
  • Istanbul Technical University Affiliated: Yes

Abstract

Eocene larger benthic foraminifera including orthophragmines, nummulitids and alveolinids from the Jahrum and Pabdeh formations in the Zagros region are presented. The studied 20-m-thick stratigraphic interval contains, Asterocyclina Gümbel 1870, Nemkovella Less 1987, Orbitoclypeus Silvestri 1907, Discocyclina Gümbel 1870, Nummulites Lamarck 1801, Assilina d’Orbigny 1826 and Alveolina d’Orbigny 1826. This larger benthic foraminiferal assemblage testifies for the shallow benthic zones (SBZs) 15 to 17, which ranges from the middle Lutetian up to the early Bartonian. Further micropaleontological analysis made on intercalated plank-tonic-rich levels helps calibrate the larger foraminifera biostratigraphy, demonstrating a correlation with the E11 biozone. This confirms that the chronostratigraphic calibration of the SBZs made by previous authors for the peri-Mediterranean area can, through the middle Lutetian to the early Bartonian, be applicable in the Middle East as well.