Praeorbitolina claveli n.sp. (benthic Foraminifera) from the Lower Aptian sensu lato (Bedoulian) of Central Iran

Schlagintweit, Félix; Bucur, Ioan I.; Rashidi, Koorosh; Saberzadeh, Behnam

doi:10.4267/2042/51217

Cited by 25 publications

(11 citation statements)

References 19 publications

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“…pachymarginalis was initially described from the Bedoulian-Gargasian boundary (Schroeder, 1965). It is frequently mentioned from uppermost Bedoulian (Mancinelli and Chiocchini, 2006) or upper Bedoulian-Gargasian (Schlagintweit et al 2013a(Schlagintweit et al , 2013b) deposits, and was recently reported from the lower Barremian-Bedoulian (Yazdi-Moghadam et al, 2017). The stratigraphic range of the orbitolinids from the Gelian section is consistent with the above-mentioned distributional data (Fig.…”

Section: Figsupporting

confidence: 89%

The Lower Cretaceous Tirgan Formation in the Gelian Section (Kopet Dagh, North Iran): Microfacies, Microfossils, and Their Biostratigraphic Significance

Bucur¹,

Yarahmadzahi²,

Mircescu³

2019

Actapalrom

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The carbonate succession of the Tirgan Formation was studied in the Gelian section located 25 km south of Shirvan town (central Kopet Dagh). In this section, the Tirgan Formation contains a rich assemblage of calcareous algae and foraminifera. Based mainly on the orbitolinid association a latest Barremian-ealy Aptian age was assigned to the Tirgan Formation in the Gelian section. Based on the available stratigraphic analyses and age assignments of the overlying Sarcheshmeh Formation by different authors, one should presume that both the Tirgan and the Sarcheshmeh formations are heterochronous across the Kopet Dagh basin.

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Section: Figsupporting

confidence: 89%

The Lower Cretaceous Tirgan Formation in the Gelian Section (Kopet Dagh, North Iran): Microfacies, Microfossils, and Their Biostratigraphic Significance

Bucur¹,

Yarahmadzahi²,

Mircescu³

2019

Actapalrom

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“…(i.e., Deshayesi-Furcata ammonite zones) (SCHROEDER et al, 2010). In Iran, it was found in Bedoulian strata too (SCHLAGINTWEIT et al, 2013). In Lebanon it was first reported by MOULLADE and SAINT-MARC (1975: Pl.…”

Section: 2) Benthic Foraminifersmentioning

confidence: 87%

Revision of "Falaise de Blanche" (Lower Cretaceous) in Lebanon, with the definition of a Jezzinian Regional Stage

Maksoud¹,

Granier²,

Azar³

et al. 2014

Carnets Geol.

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The "Falaise de BLANCHE" is a prominent cliff, consisting mostly of Lower Cretaceous limestones that extends as linear outcrops over most of the Lebanese territory and provides geologists a remarkable reference for stratigraphic studies. However, until now, this unit was lacking a clear definition. We introduce herein the Jezzinian Regional Stage, the type-locality of which is at Jezzine. It equates as an unconformity-bounded unit and, per definition, it is framed by two discontinuities. Because we identified an additional, median sequence-boundary, poorly-expressed in the type-section but better at Aazour, only 4.5 km westward of Jezzine, the new regional stage implicitly spans two sequences. The lithostratigraphic framework being properly redefined, we were able to investigate timeconstrained micropaleontological assemblages, consisting mostly of benthic foraminifers and calcareous algae. Typically Southern Tethysian, these assemblages contribute to high-resolution, holostratigraphic correlations with the Persian Gulf area, on the eastern part of the Arabian Plate. The Jezzinian interval correlates with the upper part of the Kharaibian Regional Stage (also known as "Thamama II" reservoir unit in the oil industry). In turn, the Jezzinian is indirectly correlated with the Northern Tethysian Urgonian stratigraphic units where it corresponds to a rather short interval encompassing the standard Barremian-Bedoulian stage boundary. Locally the upper discontinuity is associated to a significant intra-Bedoulian hiatus. The macrofossil assemblages found in the Jezzinian (echinids) and above it (ammonites) support, or at least do not contradict, our micropaleontological dating.

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“…1): the Anarak section near Anarak and the Herisht sections (T and H) close to Ardakan. First results indicate that the stratigraphy of these carbonates, in Iranian geology often designated as "Orbitolina limestones" (e.g., Stöcklin, 1971), may be highly different (e.g., Schlagintweit et al, 2013). In fact, orbitolinid foraminifera represent frequent constituents in these carbonates, mostly wacketo packstones, where bioerosional processes may affect their tests.…”

Section: Geological Settingmentioning

confidence: 93%

Bioerosive structures in orbitolinid foraminifera: examples from the Lower Cretaceous of Central Iran

Schlagintweit¹,

Bucur²,

Rashidi³

et al. 2013

Studia UBB Geologia

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Abstract. Lower Cretaceous orbitolinid assemblages from Central Iran yield various bioerosional structures. The omnipresent traces of different boring taxa and groups (e.g., sponges, calcimicrobes, incertae sedis) represent a characteristic feature of the investigated thin-section material. The assemblage can be attributed to the Entobia ichnofacies dominated by borings assigned to the activity of sponges. The boring galleries are often concentrated in a plane parallel to the test surface, along the boundary of the marginal and the central zone of the orbitolinid tests. The borings are observed in foraminiferan-dasycladalean wackestones to poorly washed-out packstones, which can be referred to a subtidal palaeoenvironment.

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Praeorbitolina claveli n.sp. (benthic Foraminifera) from the Lower Aptian sensu lato (Bedoulian) of Central Iran

Cited by 25 publications

References 19 publications

The Lower Cretaceous Tirgan Formation in the Gelian Section (Kopet Dagh, North Iran): Microfacies, Microfossils, and Their Biostratigraphic Significance

The Lower Cretaceous Tirgan Formation in the Gelian Section (Kopet Dagh, North Iran): Microfacies, Microfossils, and Their Biostratigraphic Significance

Revision of "Falaise de Blanche" (Lower Cretaceous) in Lebanon, with the definition of a Jezzinian Regional Stage

Bioerosive structures in orbitolinid foraminifera: examples from the Lower Cretaceous of Central Iran

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