Oligocene larger foraminifera from United Arab Emirates, Oman and Western Desert of Egypt

Boukhary, Mohamed; Abdelghany, Osman; Hussein-Kamel, Yasmine; Bahr, Salah; Al-Sayigh, Abdul Razak; Abdelraouf, M.

doi:10.1080/08912960903570047

Cited by 15 publications

(7 citation statements)

References 14 publications

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“…cf. fichteli of Kutch are not known to occur in the Lower Oligocene localities of Europe like Priabona and Biarritz (see Adams 1965) and the Middle East (see Racey 1995;Boukhary et al 2010).…”

Section: Remarksmentioning

confidence: 98%

Saddle-shaped reticulate Nummulites from Early Oligocene rocks of Khari area, SW Kutch, India

2011

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Saddle-shaped reticulate Nummulites from the Early Oligocene rocks of Khari area, SW Kutch, India is reported here for the first time. Unusual shape of this Nummulites is due to the curved nature of the coiling plane, indicating space constrained postembryonic test growth. With regular development of chambers, septa and septal filaments, the saddle-shaped Nummulites constitutes the third morphotype of N. cf. fichteli Michelotti form A. Other morphotypes of the species reported earlier include inflated lenticular and conical tests. Multiple morphotypes of N. cf. fichteli form A indicates varied test growth in response to substrate conditions. Morphological variability exhibited by N. cf. fichteli form A from Kutch and some Early Oligocene reticulate Nummulites from the Far East are comparable. This faunal suite is morphologically distinct from the contemporary reticulate Nummulites of the European localities.

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Section: Remarksmentioning

confidence: 98%

Saddle-shaped reticulate Nummulites from Early Oligocene rocks of Khari area, SW Kutch, India

2011

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“…Other previous studies [2,3,10] assigned the Lower to Middle Oligocene age (33.9 to 23.03 my) based on taxonomic, biostratigraphic and paleoecological data on the smaller and larger foraminifera obtained from the Oligocene marls and limestones outcrops in the UAE (Asmari Formation, Jabals Hafit and Malaqet). But [6] studied the content of the larger foraminifera (such as N . fichteli, N .…”

Section: Discussionmentioning

confidence: 99%

“…The reefal limestones of the Asmari Formation represent a shoal margin prograding complex [5]. The age of the formation was assigned as the Early Oligocene (Rupelian) based on a diagnostic [16] after [1,2] and [7]) larger foraminiferal assemblage [6]. The rocks of the Asmari Formation form the outer ridges surrounding Jabal Hafit (Fig.…”

Section: Introductionmentioning

confidence: 99%

Isotope Stratigraphy of Oligocene Limestone in Al-Ain City, United Arab Emirates

et al. 2012

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The rocks of the Oligocene Asmari Formation represent the outer ridges surrounding Jabal Hafit anticline. The carbonate beds of this formation dip gently under the northern and western sides of Al-Ain city. The beds are dissected by several sets of joints and characterized by the abundance of the connected caves of different sizes, particularly in the thick chalky beds. In this study, petrographic and mineralogical studies by X-ray diffraction analysis and scanning electron microscope revealed that the examined carbonate rock samples are made up mainly of calcite and minor of authigenic dolomite and quartz minerals.

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“…Northwestern Iran is characterized by well-exposed Mesozoic and Cenozoic marine strata (e.g., Sarfi and Yazdi-Moghadam 2016 ; Yazdi-Moghadam et al 2017 ; Omidvar et al 2018 ; Yazdi-Moghadam et al 2018a , b ). Oligo-Miocene shallow-marine carbonates often contain diverse assemblages of larger benthic foraminifera (LBF) that have been extensively used for biostratigraphic dating, palaeoenvironmental interpretation, and palaeobiogeography of shallow-marine sequences of the Western Tethys, the Middle East, and the Indo-Pacific region (e.g., Cushman 1939 ; Henson 1948 ; Drooger 1952 ; Bozorgnia 1966 ; Hansen and Lykke-Andersen 1976 ; Schaub 1981 ; Less 1991 ; Cahuzac and Poignant 1997 ; Vaziri-Moghaddam et al 2006 ; Hottinger 2007 ; Özcan and Less 2009 ; Boukhary et al 2010 ; Özcan et al 2010 ; Sirel et al 2013 ; Hakyemez et al 2016 ; Saraswati et al 2018 ). Associated with the other shallow-marine biota (e.g., echinoderms, pelecypods, gastropods, coralline algae), LBF characterize widespread platform carbonates of the Oligo-Miocene age which are known under different formational names from central and southern Iran, e.g., Asmari, Mishan, and Gachsaran formations (Zagros Mountains), or Qom Formation (Central Iran).…”

Section: Introductionmentioning

confidence: 99%

Early Miocene larger benthic foraminifera from the northwestern Tethyan Seaway (NW Iran): new findings on Shallow Benthic Zone 25

Yazdi-Moghadam

Sarfi

Ghasemi-Nejad

et al. 2021

Int J Earth Sci (Geol Rundsch)

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The lower Miocene marine units of NW Iran (Hamedan-Miandoab area) were studied to establish a high-resolution biostratigraphy framework in the context of European standard biozonation (SBZ zonal scheme). The units are dominated by larger and small benthic foraminifera together with coralline algae and corals. Due to its position in the Tethyan Seaway between the Mediterranean and Indo-Pacific, the investigated area has high significance in palaeobiogeography. Seven species of benthic foraminifera were described, including Miogypsina globulina, Amphistegina bohdanowiczi, Elphidium crispum, Elphidium sp. 1, Borelis curdica, Austrotrillina asmariensis, and Peneroplis thomasi. The occurrence of Miogypsina globulina in the shallow-marine carbonates of the studied sections documents the Burdigalian SBZ 25 Zone. Austrotrillina asmariensis and Peneroplis thomasi occur with M. globulina. Simultaneously, their stratigraphical range is extended to the Burdigalian in the Middle East. Based on the discovery of lower Miocene deposits in the Hamedan-Miandoab area (previously mapped as Oligocene-Miocene units), the stratigraphy of northwest Central Iran is revised. The biostratigraphic results also present a more precise chronology for the marine transgression in the study area, initiating in the late early Miocene. The coralline algal assemblages and the abundance and diversity of larger benthic foraminifera indicate that shallow-marine Qom Formation got deposited in tropical to subtropical warm waters.

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Oligocene larger foraminifera from United Arab Emirates, Oman and Western Desert of Egypt

Cited by 15 publications

References 14 publications

Saddle-shaped reticulate Nummulites from Early Oligocene rocks of Khari area, SW Kutch, India

Saddle-shaped reticulate Nummulites from Early Oligocene rocks of Khari area, SW Kutch, India

Isotope Stratigraphy of Oligocene Limestone in Al-Ain City, United Arab Emirates

Early Miocene larger benthic foraminifera from the northwestern Tethyan Seaway (NW Iran): new findings on Shallow Benthic Zone 25

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