Ammonites and Foraminifera of Shiranish Formation (Late Campanian-Maastrichtian) from Sulaimaniya and Erbil Governorates, Northern Iraq

Authors

  • Anhar I. Kamil Department of Geology, College of Science, Baghdad University. Baghdad, Iraq
  • Salam Al-Dulaimi Department of Geology, College of Science, Baghdad University. Baghdad, Iraq
  • Kamal Haji Karim Department of Geology, College of Science, Sulaimaniya University. Sulaimaniya, Iraq

DOI:

https://doi.org/10.24996/ijs.2021.62.12.12

Keywords:

Biostratigraphy, Late Cretaceous, Shiranish Formation, Ammonite, Foraminifera, Northern Iraq

Abstract

    This study deals with the biostratigraphy of Shiranish Formation (Late Cretaceous), depending on the Ammonite and associated Foraminifera in four outcrop sections, three of which are located in Al-Sulaimaniya governorate  (Dokan, Esewa and Kanny dirka sections) and one in Erbil  governorate, northern Iraq (Hijran section). Fourteen species of Ammonite belonging to fourteen genera were determined, which are: Dsemoceratidae, Gaudryceras, Gunnarites, Hoplitoplacenticeras, Kitchinites, Kossmaticeratinae, Neancyloceras, Neokossmaticeras, Nostoceras, Paratexanites, Partschiceras, Phylloceras, Pseudophyllites and Yubariceras. Also, thirty- five species of Foraminifera belonging to thirteen genera were determined, which are: Cibicides, Cymopolia, Eggellina, Elphidium, Globigerinelloides, Globotruncana, Hedbergella, Heterohelix, Marginulina, Miliolid, Neobulimmina, Nodosaria and Textularia. Seven range zones were determined, three of which are of Ammonite, which are: Desmophyllites larteti (Seunes, 1892), Nostoceras (Nostoceras) hyatti and Pseudophyllites teres (Van Hoepen, 1920), whereas the others are of Foraminifera species, which are: Glt. gagnebini Tilev, Glt. tricarinata lapparenti Brotzen, Glt. tricarinata tricarinata (Querean) and Glt. Stuartiformis Dalbiez. According to these findings, the age of Shiranish Formation was determined as the Late Campanian- Maastrichtian.

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Published

2021-12-30

How to Cite

Kamil, A. I. ., Al-Dulaimi, S. ., & Karim, K. H. . (2021). Ammonites and Foraminifera of Shiranish Formation (Late Campanian-Maastrichtian) from Sulaimaniya and Erbil Governorates, Northern Iraq. Iraqi Journal of Science, 62(12), 4712–4746. https://doi.org/10.24996/ijs.2021.62.12.12

Issue

Section

Geology