Year 2019, Volume 28, Issue 1, Pages 122 - 145 2019-01-15

Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran)

Mehdi HADI [1] , Mohammad VAHIDINIA [2] , Juraj HRABOVSKY [3]

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A high diversity of larger benthic foraminifera (LBF) fauna is recognized from the Ilerdian-Cuisian sedimentary succession for the first time of the Birjand region, Sistan Suture Zone of eastern Iran. These foraminifera are described in accordance with the standard shallow benthic zonation, placing considerable emphasis on biostratigraphic and microfacies analysis implications. Four shallow benthic zones (SBZ8 and SBZ10-12) have been designated in LBF horizons comprising index zonal markers such as Alveolina elliptica nuttalli (Davies), A. decipiens (Schwager), A. cf. oblonga, A. cf. minuta, A. cf. rugosa, A. cf. decastroi, A. aff. cremae, A. frumentiformis, A. aff. palermitana, N. cf. atacicus (Leymerie), N. tauricus (De la Harpe), N. pratti (d?Archia & Haime), N. polygyratus (Deshayes), N. cf. distans (Deshayes), Assilina sublaminosa (Gill), A. placentula (Deshayes), Asterocyclina cf. schweighauseri (Less), Discocyclina archiaci cf. staroseliensis (Less), and D. cf. archiaci bartholomei (Schlumberger). Five microfacies types including Alveolina-Opertorbitolites packstone (locally grainstone), nummulitids-Alveolina rudstone, Nummulites rudstone, Assilina-Nummulites rudstone, and orthophragminid-nummulitid pack-rudstone have been defined in the current study. Microfacies type 1 is finely characterized by high abundance of Alveolina with the predominance of A-form and globular to slightly elongate forms. Microfacies type 2 is dominated by small nummulitids in association with the abundance of the most diverse Alveolina species. Microfacies type 3 is composed of a diverse community of nummulitids, principally Nummulites A-forms along with Assilina. Microfacies type 4 is distinguished by a high diversity of not only A- and B-forms of Nummulites, but also Assilina specimens. Eventually, orthophragminids and nummulitids are common in microfacies type 5. Analysis of the Ilerdian-Cuisian deposits on the basis of the distribution of both biotic and abiotic components suggests depositions in a shallow ramp environment with deepening upward from the middle Ilerdian to the late Cuisian.

Eastern Iran, Ilerdian-Cuisian, larger benthic foraminifera, microfacies, shallow benthic zone
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Primary Language en
Subjects Engineering
Journal Section Articles

Orcid: 0000-0001-6082-4552
Author: Mehdi HADI

Orcid: 0000-0002-9177-3062
Author: Mohammad VAHIDINIA

Orcid: 0000-0001-8317-7706
Author: Juraj HRABOVSKY

Bibtex @research article { tbtkearth513055, journal = {Turkish Journal of Earth Sciences}, issn = {1300-0985}, eissn = {1303-619X}, address = {TUBITAK}, year = {2019}, volume = {28}, pages = {122 - 145}, doi = {}, title = {Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran)}, key = {cite}, author = {HADI, Mehdi and VAHIDINIA, Mohammad and HRABOVSKY, Juraj} }
APA HADI, M , VAHIDINIA, M , HRABOVSKY, J . (2019). Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran). Turkish Journal of Earth Sciences, 28 (1), 122-145. Retrieved from
MLA HADI, M , VAHIDINIA, M , HRABOVSKY, J . "Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran)". Turkish Journal of Earth Sciences 28 (2019): 122-145 <>
Chicago HADI, M , VAHIDINIA, M , HRABOVSKY, J . "Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran)". Turkish Journal of Earth Sciences 28 (2019): 122-145
RIS TY - JOUR T1 - Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran) AU - Mehdi HADI , Mohammad VAHIDINIA , Juraj HRABOVSKY Y1 - 2019 PY - 2019 N1 - DO - T2 - Turkish Journal of Earth Sciences JF - Journal JO - JOR SP - 122 EP - 145 VL - 28 IS - 1 SN - 1300-0985-1303-619X M3 - UR - Y2 - 2018 ER -
EndNote %0 Turkish Journal of Earth Sciences Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran) %A Mehdi HADI , Mohammad VAHIDINIA , Juraj HRABOVSKY %T Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran) %D 2019 %J Turkish Journal of Earth Sciences %P 1300-0985-1303-619X %V 28 %N 1 %R %U
ISNAD HADI, Mehdi , VAHIDINIA, Mohammad , HRABOVSKY, Juraj . "Larger foraminiferal biostratigraphy and microfacies analysis from the Ypresian (Ilerdian-Cuisian) limestones in the Sistan Suture Zone (eastern Iran)". Turkish Journal of Earth Sciences 28 / 1 (January 2019): 122-145.