Persiconus sarvaki gen. et sp. nov., a new complex orbitolinid (Foraminifera) from the Cenomanian of the Sarvak Formation (SW Iran, Zagros Zone)

Yazdi-Moghadam, Mohsen; Schlagintweit, Félix

doi:10.1016/j.cretres.2020.104380

Cited by 20 publications

(6 citation statements)

References 32 publications

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“…S. stefaninii displays a wider distribution than D. aydimi, with additional reports from Tanzania (Cotton, 2012), Somalia (Silvestri, 1939), and far from there, the Zakynthos Island of Greece (Di Carlo and Pignatti, 2009). The spatial distributional pattern of D. aydimi reflects a faunal provincialism of the Dictyoconinae for the Arabian Plate reported previously from the Cenomanian (e.g., Henson, 1948;Bernaus and Masse, 2006;Schlagintweit and Rashidi, 2017, Table 1; Schlagintweit and Yazdi-Moghadam, 2020;Yazdi-Moghadam and Schlagintweit, 2020) and Maastrichtian (Schlagintweit et al, 2016). The Gulf of Aden was still closed in the Eocene, forming in the Oligocene-Miocene (e.g., d'Ecremont et al, 2005).…”

Section: Systematic Descriptionsupporting

confidence: 73%

“…The spatial distributional pattern of D. aydimi reflects a faunal provincialism of the Dictyoconinae for the Arabian Plate reported already from the Cenomanian (e.g., Henson, 1948;Bernaus and Masse, 2006;Schlagintweit and Rashidi, 2017, tab. 1;Schlagintweit and Yazdi-Moghadam, 2020;Yazdi-Moghadam and Schlagintweit, 2020) and Maastrichtian (Schlagintweit et al, 2016). The Gulf of Aden was still closed in the Eocene, forming in Oligocene-Miocene times (e.g., d'Ecremont et al, 2005).…”

Section: Remarks On Palaeobiogeographymentioning

confidence: 99%

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Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Özgen-Erdem¹,

Schlagintweit²,

Sinanoğlu³

2021

Turkish J Earth Sci

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IntroductionLarger agglutinated conical benthic foraminifera are a typical constituent of Paleogene inner platform carbonates (e.g., Hottinger and Drobne, 1980;Vecchio and Hottinger, 2007;Powell, 2010). As in the Lower and Upper Cretaceous (e.g., Cherchi et al., 1981), the representatives of the Dictyoconinae displayed a biogeographic distribution pattern during the Paleogene with different assemblages on both sides of the Atlantic Ocean (e.g., Carribean Bioprovince, Hottinger and Drobne, 1980; Goldbeck and Langer, 2009, Figure 27) for this group of agglutinated conical foraminifera. Paleocene taxa (e.g., Coskinon, Dictyoconus, Fallotella, and Karsella) have been reported from the Taurides of Turkey (provinces of Elazığ and Kars) (e.g., Sirel, 2015). Assemblages of Middle Eocene (Bartonian) larger benthic foraminifera (LBF), including Orbitolinidae, have been studied from the Hoya Formation in SE Turkey (north eastern Diyarbakır), belonging to the northernmost part of the Arabian Plate (Özgen-Erdem and Sinanoğlu, 2016;Sallam et al., 2018). Large-sized dictyoconids, previously referred to as Dictyoconus aegyptiensis (Chapman), usually occur above limestones with Somalina stefaninii Silvestri. They have been recognized as Rogerella aydimi Gallardo-Garcia and Serra-Kiel, as described recently in Serra-Kiel et al. (2016), from the Middle-Upper Eocene of Oman. The present findings from Turkey represent the first discovery of its type-locality. The aim of the present study was to 1) comment and revise its taxonomic status and 2) constrain its paleobiogeographic distribution, also including further specimens from the Jahrum Formation in Iran. Geological setting 2.1. Geological overviewThe south eastern Anatolian region forms the northern part of the Arabian Platform (Figure 1A) and consists of the Bitlis-Pütürge Crystalline Melange, Precambrian Basement, and Early Paleozoic-Cenozoic sedimentary deposits (Rigo de Righi and Cortesini, 1964;Sungurlu, 1974;Şengör and Yılmaz, 1981). The geological framework of this region was shaped by the Late Mesozoic and Cenozoic closure of the multibranched Neotethyan Ocean (Şengör and Yılmaz, 1981). Important folding structures developed during the Neotectonic period as a result of the N-trending compressional tectonic regime. The Cambrian, Aptian-Cenomanian, Campanian-Maastrichtian, and Middle Eocene periods are represented by marine sequences, which indicate widespread transgression Abstract: Rogerella aydimi Gallardo-Garcia and Serra-Kiel was described from the Priabonian Haluf Member of the Aydim Formation, Oman. Based on new finds from the Bartonian Hoya Formation of SE Turkey and the Jahrum Formation of Iran, its taxonomic status is discussed herein. It is concluded that it represents a species of Dictyoconus with a simple subepidermal network (1 rafter, 1 intercalary beam) below a thin epiderm. The stratigraphic range of D. aydimi known thus far is Bartonian-Priabonian or Shallow Benthic Zone 17-20. The distribution of D. aydimi gives further evidence for a Middle-Late Eocene ...

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Section: Systematic Descriptionsupporting

confidence: 73%

Section: Remarks On Palaeobiogeographymentioning

confidence: 99%

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Özgen-Erdem¹,

Schlagintweit²,

Sinanoğlu³

2021

Turkish J Earth Sci

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“…Within the framework of our observations in the Cenomanian Sarvak Formation of Iraq (e.g. Yazdi-Moghadam and Schlagintweit, 2020), no specimens of G. minima have been observed. There are specimens of an orbitolinid displaying a pillared central zone and a complex exoskeleton that needs further taxonomic study and evaluation, and it is different from G. minima.…”

Section: Derivation Of the Namementioning

confidence: 45%

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2021

Actapalrom

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In his monograph on Mesozoic-Cenozoic Larger Benthic Foraminifera from the area of Middle East and southwestern Asia, Henson (1948) erected the genus Dictyconella for more or less "compressed-conical" dictyoconids including D. complanata (type-species) and D. minima. Both are however, structurally completely different, e.g. aligned (in the latter) versus alternating structural elements (in the former), and cannot either belong to the same genus or the same subfamily (Dictyoconinae versus Dictyorbitolininae). Therefore, the new genus Gusicella is erected with the type-species Dictyoconella minima, resulting in the new combination Gusicella minima. Gusicella represents the only taxon of the Dictyorbitolininae in the Upper Cretaceous Global Community Maturation Cycle of Larger Benthic Foraminifera (here: conical agglutinated). Due to the revision, Dictyoconella is described as a monospecific genus and an assumed Maastrichtian newcomer which, like Gusicella, became extinct shortly afterwards, namely at the K-Pg boundary mass-extinction event. Both taxa appear to be restricted to the former Arabian Plate of the southern Neotethyan margin. The new data provided are based on material from the Maastrichtian Tarbur Formation of southwestern Iran (Zagros Zone).

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“…Common forms of dehydration are nodular fibers, elongated crystals of lath, and decussate, found in a matrix of fine-grained sediments. The presence of nodular and nodular-mosaic anhydrides in the cap rock (Figure 2A) indicates anhydrite simultaneously with deposition in the new evaporative medium, and indicates a stratified medium or platform margin [17]. The presence of this anhydrite nodule together with anhydrite crystals in the form of large anhydrite pseudomorphs, separate crystals and needles is one of the common forms of primary anhydrite.…”

Section: Anhydrificationmentioning

confidence: 99%

Investigation of Petrographic and Diagenetic Properties of Asmari Reservoir Cap Rock, SW Iran

Abbasi

Pourmorad²,

Mohanty³

2021

J. Hum. Earth Future

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Many problems in the production and development of oil fields lie in the correct and accurate assessment of the reservoir cap rock. Ramshir oil field is located 130 km southeast of Ahvaz and is one of the most important oil fields in the southwest of the country. To evaluate the petrographic and diagenetic properties, 300 thin microscopic sections were studied. According to petrographic studies, it was found that the cap rock in Ramshir oil field is composed of more evaporative sediments (mainly anhydrite with some gypsum) with some non-evaporative sediments (marl, carbonate and bituminous shale). The most important diagenetic processes in the study area were considered to be dolomitization, cementation, compaction, anhydrite, recrystallization and substitution. Petrographic and diagenetic studies suggest a swamp-swamp environment for this environment. Lithological changes are a sign of hot, humid, hot and dry weather during sedimentation of the cap rock of this field. Doi: 10.28991/HEF-2021-02-03-06 Full Text: PDF

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Persiconus sarvaki gen. et sp. nov., a new complex orbitolinid (Foraminifera) from the Cenomanian of the Sarvak Formation (SW Iran, Zagros Zone)

Cited by 20 publications

References 32 publications

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

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Investigation of Petrographic and Diagenetic Properties of Asmari Reservoir Cap Rock, SW Iran

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