Distribution of Miogypsinoides in the Zagros Basin, in southwest Iran

Amirshahkarami, Mahnaz

doi:10.1080/08912960802516893

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…Family MIOGYPSINIDAE Vaughan 1928 Genus Miogypsinoides Yabe andHanzawa 1928 Miogypsinoides complanatus (Schlumberger 1900) Figure 3D Miogypsinoides formosensis Yabe and Hanzawa 1928 Figure 11A-11K Based on the number of postembryonic spiral chambers, successive biostratigraphically significant chronospecies of Miogypsinoides have been defined, (Drooger and Laagland 1986;Drooger 1993). In reality, there is considerable stratigraphic overlap among these chronospecies (e.g., Cahuzac and Poignant 1997;Bassi et al 2007;Amirshahkarami 2008;Özcan et al 2010; Boudagher-Fadel and Price 2013) as well as considerable population variability. For example, Özcan et al (2010) reported a variability of 4-14 spiral chambers in M. formosensis.…”

Section: Rebaldí Sectionmentioning

confidence: 99%

“…In the Rebaldí section, the average number of spiral chambers is higher (16-21, n = 5) and would correspond to M. complanatus. These two species are placed in the Chattian, SBZ 23, but the substantial stratigraphic overlap they show (e.g., Amirshahkarami 2008) precludes a clear differentiation of two sub-biozones based only in Miogypsinoides (e.g., Báldi et al 1999).…”

Section: Rebaldí Sectionmentioning

confidence: 99%

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Late Chattian Larger Foraminifera From the Prebetic Domain (Se Spain): New Data on Shallow Benthic Zone 23

Ferràndez-Cañadell¹,

Bover‐Arnal²

2017

PALAIOS

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The Rebaldí section, a succession of late Oligocene limestones 3 km north of the Benitatxell section, shows a similar association with Peneroplis thomasi, A. asmariensis, M. complanatus, Neorotalia viennoti, N. lithothamnica, Heterostegina aff. assilinoides, Spiroclypeus blanckenhorni, Cycloclypeus mediterraneus, A. bohdanowiczi, and Risananeiza pustulosa; it is interpreted as the early part of SBZ 23. This section also contains Praebullalveolina aff. oligocenica, described from the early Rupelian of Turkey, and Schlumbergerina alveoliniformis, previously interpreted as Burdigalian-Recent. Prior to this work, Cycloclypeus mediterraneus was considered to go extinct and be replaced by C. eidae at the SBZ 22B-23 boundary. However, its presence in the Benitatxell and Rebaldí sections extends its range to the late Chattian in the Eastern Betics and indicates an asynchronous extinction in the Tethys. The presence of Amphistegina mammilla Fichtel and Moll 1798 in late Chattian deposits from the western Tethys contradicts the currently accepted hypothesis that places its origin in the Indo-Pacific province in the early Miocene, from where it would have migrated into the Parathethys during the middle Miocene. In addition, the biogeographic range of P. thomasi, A. asmariensisi, and P. oligocenica is extended to the westernmost part of the Tethys.

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Section: Rebaldí Sectionmentioning

confidence: 99%

Section: Rebaldí Sectionmentioning

confidence: 99%

Late Chattian Larger Foraminifera From the Prebetic Domain (Se Spain): New Data on Shallow Benthic Zone 23

Ferràndez-Cañadell¹,

Bover‐Arnal²

2017

PALAIOS

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“…The presence of Miogypsinoides, Neorotalia and coral and the debris of corallinacea and Heterostegina, as well as the stratigraphic position, indicate that this facies was formed in an open marine middle shelf environment under normal marine salinity conditions with open water circulation and medium hydrodynamic energy (Amirshahkarami et al 2007;Amirshahkarami 2008). The presence of abundant open marine skeletal fauna and larger foraminifera suggest that an oligotrophic condition occurred (Pedley 1996;Pomar 2001).…”

Section: Discussionmentioning

confidence: 93%

The Asmari Formation, north of the Gachsaran (Dill anticline), southwest Iran: facies analysis, depositional environments and sequence stratigraphy

Dill

Seyrafian

Vaziri‐Moghaddam

2010

Carbonates Evaporites

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The Asmari Formation is exposed at the Dill anticline in the Dezful Embayment of the Zagros foreland basin with 206 m thickness comprising thin, medium and thick to massive bedded carbonates. The Asmari Formation is Late Oligocene (Chattian)-Early Miocene (Burdigalian) in age at the study area. Ten facies characterizing upward gradual shallowing trend of an open marine (MF 1-3), shoal (MF 4), semi-restricted and restricted lagoon (MF 5-9) and near-shore lagoon (MF 10) depositional environments were identified. Based on environmental interpretations, a homoclinal ramp consisting of inner and middle parts prevails. MF 4-10 were characterized by the occurrence of large and small porcelaneous benthic foraminifera representing a shallow-water setting of an inner ramp influenced by wave and tide processes. MF 1-MF 3 with large and small hyaline benthic foraminifera represent a deeper fair water wave base of a middle ramp setting. Three-third-order depositional sequences were recognized. Sequence 1 mostly consists of an open marine to the lower part and is followed by semi to restricted lagoon facies. Sequences 2 and 3 are characterized by semi to restricted lagoon facies. Moreover, the relative sea-level change curves correlate with the global sea-level change curves.

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“…Only taxonomy of foraminifera in the Asmari Formation has been explained by Henson (1950) and Adams and Bourgeois (1967). Description and paleontology of Miogypsinoides in the Zagros Basin in southwest Iran has been explained by Amirshahkarami (2008). Anyway, a taxonomic revision in the foraminifera from the Asmari Formation is necessary to accurate biostratigraphy of the Oligocene-Miocene depositions of the Zagros Basin.…”

Section: Previous Workmentioning

confidence: 99%

Revision in the paleontology and distribution of the larger benthic foraminifera in the Oligocene–Miocene deposits of the Zagros Basin, southwest Iran

Amirshahkarami

2013

Historical Biology

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The present research is a revision in the distribution and description of the larger benthic foraminifera from the OligoceneMiocene Asmari Formation in the Zagros Basin in southwest Iran. From the shallow marine carbonates of the Asmari Formation, 21 genera and 41 species of larger benthic foraminifera have been identified of which 22 species have been described in recent research. The described genera belong to 11 families. The recognised foraminifera includes Nummulites, and Borelis. On the basis of the distribution of the larger benthic foraminifera, five assemblage biozones have been recorded in the Asmari Formation in the study area. The foraminifers' assemblages indicate to Oligocene (Rupelian and Chattian stages) and lower Miocene (Aquitanian and Burdigalian stages) times. There is a similarity of the Mediterranean and Indo-West Pacific fauna with the Asmari Formation fauna in the Rupelian -Chattian times. On the basis of the dissimilarity distribution of larger benthic foraminifera, there was no connection seaway between the shallow marine limestone of the Asmari Formation and Indo-West Pacific region in the Aquitanian and Burdigalian times.http://zoobank.org/9F01EBBD-1EE4-47EA-B51B-D03B279A7D59

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Distribution of Miogypsinoides in the Zagros Basin, in southwest Iran

Cited by 8 publications

References 16 publications

Late Chattian Larger Foraminifera From the Prebetic Domain (Se Spain): New Data on Shallow Benthic Zone 23

Late Chattian Larger Foraminifera From the Prebetic Domain (Se Spain): New Data on Shallow Benthic Zone 23

The Asmari Formation, north of the Gachsaran (Dill anticline), southwest Iran: facies analysis, depositional environments and sequence stratigraphy

Revision in the paleontology and distribution of the larger benthic foraminifera in the Oligocene–Miocene deposits of the Zagros Basin, southwest Iran

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