دوفصلنامه چینه نگاری و دیرینه شناسی

دوفصلنامه چینه نگاری و دیرینه شناسی

Lithostratigraphy and biostratigraphy of planktic and benthic foraminifera (Oligocene-Early Miocene), Kurdistan Region, Northeastern Iraq

نویسندگان
Imad Ghafor
Pshtiwan Ahmad
Department of Earth Sciences and Petroleum, College of Science, University of Sulaimani, Kurdistan Region, Iraq
10.30470/zpaleo.2025.731781
چکیده
The lithostratigraphy and biostratigraphy are carried out for the first time in the Pungalla section and have not previously been described. Forty samples were collected for this study in the Sulaimaniyah area, Kurdistan Region, Iraq. The study succession is located within the low-folded zone. The lithology of the succession here is composed of massive fossiliferous limestone, marly limestone, bedded highly joined and fractured oolitic limestone, and coralline limestone. For the first time, these rock units are described in detail. It is possible to attribute them to the Shurau, Tarjil, Bajwan, Anah, Jeribe, and Fatha formations. It bears a frequent number of benthic and planktic foraminifera and other fossil groups such as echinoid fragments, bryozoans, calcareous algae, bivalve, gastropods, and coral that are concentrated within the rock units. Six foraminiferal biozones were identified in the studied section: Austrotrillina paucialveolata- Austrotrillina brunni Assemblage Zone (SBZ21); Praerhapydionina delicata- Peneroplis evolutus Concurrent-Range Zone (SBZ22A-BZ22B); Meandrospina anahensis- Austrotrillina asmariensis Assemblage Zone (SBZ23); Austrotrillina howchini- Peneroplis farsensis Interval Zone (SBZ24); Ammonia beccari- Dendritina rangi Assemblage Zone (SBZ250); and Paragloborotalia opima-Dentoglobigerina prasaepis  Assemblage Zone (P21). These marker foraminifers' biozones suggest an Oligocene to early Miocene age. They are correlated with comparatively well-known biozones from other parts of the Tethys region, which shows a good comparison.
کلیدواژه‌ها
Oligocene-Lower Miocene
Foraminifera
Stratigraphy
Sulaimaniyah
Northeast Iraq