scholarly journals Biostratigraphy of the Gurpi Formation (Zagros Basin, western Iran) based on planktonic foraminifera

2020 ◽  
Vol 49 (1) ◽  
pp. 53-66
Author(s):  
Atusa Honarmand ◽  
Mohammad Vahidinia ◽  
Mohammad Hosein Mahmudy Gharaie ◽  
Meysam Shafiee Ardestani
Keyword(s):  
Planktonic Foraminifera ◽  
Zagros Basin ◽  
Western Iran ◽  
Total Range ◽  
Gurpi Formation

Micropalaeontological and biostratigraphic studies of the Gurpi Formation were carried out at the Kuhe-Surgah section (Zagros Basin, Iran). In this research, 62 species of planktonic foraminifera, belonging to 23 genera, were recognized and used to describe the following zones: 1) Contusotruncana plummerae Interval Zone; 2) Radotruncana calcarata Total Range Zone; 3) Globotruncanella havanensis Partial Range Zone; 4) Globotruncana aegyptiaca Interval Zone; 5) Gansserina gansseri Interval Zone; 6) Contusotruncana contusa Interval Zone; 7) Abathomphalus mayaroensis Interval Zone; 8) Pseudoguembelina hariaensis Interval Zone; 9) Pseudotextularia elegans Interval Zone; 10) Parvularugoglobigerina eugubina Total Range Zone; 11) Parasubbotina pseudobulloides Interval Zone; and 12) Praemurica unicinata Interval Zone. Based on the ranges of planktonic foraminifera, the age of the Kuhe-Surgah section was estimated to be middle Campanian–late Danian.

New biostratigraphic observations of planktonic foraminifera and ammonites on the Aptian–Albian intrashelf succession, Zagros Basin, SW Iran

2021 ◽  
pp. 104996
Author(s):  
Javad Sharifi ◽  
Mohammad Vahidinia ◽  
Atsushi Ando ◽  
Mohammad Hossein Mahmudy-Gharaie
Keyword(s):  
Planktonic Foraminifera ◽  
Zagros Basin ◽  
Sw Iran

Biostratigraphy and Sequence Stratigraphy of the Gurpi Formation at Deh Dasht Area, Zagros Basin, SW Iran

2014 ◽  
Vol 88 (6) ◽  
pp. 1681-1695 ◽  
Author(s):  
Mahboobeh FEREYDOONPOUR ◽  
Hossein VAZIRI-MOGHADDAM ◽  
Azizollah TAHERI
Keyword(s):  
Sequence Stratigraphy ◽  
Zagros Basin ◽  
Sw Iran ◽  
Gurpi Formation

scholarly journals Stratigraphy and Sedimentology of Upper Cretaceous to Upper Palaeocene Succession in Zimam Formation Along Wadi Tar al Kabir, NW Libya

2020 ◽  
Vol 9 (2) ◽  
pp. 1
Author(s):  
Esam O. Abdulsamad ◽  
Saleh A. Emhanna ◽  
Muayid B. Asmaeil ◽  
Ahmed A. Alwddani ◽  
Fuad M. Rasheed ◽  
...  
Keyword(s):  
Benthic Foraminifera ◽  
Upper Cretaceous ◽  
Planktonic Foraminifera ◽  
Sedimentary Facies ◽  
Larger Benthic Foraminifera ◽  
Sedimentary Cycles ◽  
Total Range ◽  
Field Investigations ◽  
Sedimentary Cycle ◽  
Nw Libya

The Upper Cretaceous to Upper Palaeocene rocks of the Zimam Formation along the southwestern escarpment of the Hun Graben of NW Libya have been stratigraphically investigated from two stratigraphical sections in wadi Tar al Kabir. The field investigations led to the recognition of three members, from the oldest to the youngest, the Lower Tar Member, the Upper Tar Member and the Had Member. Eight sedimentary facies were distinguished at outcrop-scale and several microfacies were recognized and the outcome indicates that the depositions of the Zimam Formation are corresponding to two transgressive-regressive sedimentary cycles. The first cycle is attributed to the Lower Tar Member in which small planktonic foraminifera is quite common in the Campanian whereas the larger benthic foraminifera, namely, Omphalocyclus macroporus and Siderolites calcitrapoides are abundant in the Maastrichtian. The last occurrence of the latter two taxa, however, was used to delineate the contact between the Maastrichtian and Danian stages in the studied sequence. Up-sequence the sediments of the Upper Tar Member along with the overlying Had Member correspond to the second transgressive-regressive sedimentary cycle. Herein, the Upper Tar Member is enriched by small benthic foraminifera; Neoeponides duwi and Cibicides cf. libycus, and has been ascribed to the Danian (Lower Palaeocene). The reaming sediments of Zimam Formation, however, are belonging to the overlying Had Member and is tentatively ascribed to the Selandian (Upper Palaeocene) based on the last occurrence of the Danian fauna and the total range of the codiacean algae Ovulites morelleti.

scholarly journals Biostratigraphic Study of the Gurpi Formation Based on Planktonic Foraminifera In Lar Area (Kuh-e-kurdeh Section)

2009 ◽  
Author(s):  
Meysam Shafiee Ardestani ◽  
Meysam Shafiee Ardestani ◽  
Ebrahim Ghasemi-Nejad ◽  
Ali Mandanizadeh
Keyword(s):  
Planktonic Foraminifera ◽  
Gurpi Formation

scholarly journals Sequence stratigraphy of the Late Cretaceous–Paleocene Gurpi Formation in southwest Iran

GeoArabia ◽  
2014 ◽  
Vol 19 (2) ◽  
pp. 89-102
Author(s):  
Bijan Beiranvand ◽  
Ebrahim Ghasemi-Nejad ◽  
Mohammad Reza Kamali ◽  
Akram Ahmadi
Keyword(s):  
Gamma Ray ◽  
Planktonic Foraminifera ◽  
Depositional Environments ◽  
Arabian Plate ◽  
Geochemical Data ◽  
Zagros Mountains ◽  
Natural Gamma ◽  
Facies Associations ◽  
Gurpi Formation ◽  
Southwest Iran

ABSTRACT Facies associations, microplanktonic diversity, palynofacies variations, geochemical data, and natural gamma-ray logs were analyzed from the Danial and Gurpi sections of the Campanian–Selandian Gurpi Formation in the Zagros Mountains, southwest Iran. The biostratigraphic data indicate that deposition across the Cretaceous/Paleogene boundary was continuous in the Danial Section. In contrast, a minor stratigraphic break seems to be present in the Gurpi Section, where several planktonic foraminiferal subzones are not identified. Nine depositional sequences were interpreted and correlated between the two sections. They are apparently of great lateral extent because they closely correlate to the global sea-level cycles. The Maastrichtian maximum flooding surface MFS K180 (68 Ma) of the Arabian Plate was also identified. Detailed palynofacies analysis, integrated with standard tropical/subtropical planktonic foraminifera, indicate warm Neo-Tethyan upper-bathyal to middle-shelf depositional environments for the Gurpi Formation.

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