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Benthic Foraminiferal and Calcareous Algae Assemblages in the Tirgan Formation (Urgonien Facies Type) in South Flank of Ghorogh Syncline (North of Chenaran), NE Iran
Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
Department of Geology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
Department of Geology, University of Tehran, Tehran, Iran
- 1 Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 2 Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 3 Department of Geology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
- 4 Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 5 Department of Geology, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 6 Department of Geology, University of Tehran, Tehran, Iran
Open Journal of Geology·Volume 07 (2017)·Pages 796–805·Published 2 June 2017·DOI10.4236/ojg.2017.76054
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Abstract
In this research, the Tirgan Formation in the south flank of Ghorogh Syncline (north of Chenaran), northeastern Iran with the thickness of 251 was studied. This section consists of limestone, marly limestone and shale with impressions of echinoderms toxasteridae family, many of foraminifera from orbitolinidae family and also lots of calcareous algae that create facies variation along with other non-skeletal allochems. Micropaleontological investigation has been carried out on 90 thin-sections. These criteria reveal that an equivalent of the Urgonian facies type (in France-Swiss area) and open marine, low depth sedimentary basin are extended in the Kopet-Dagh basin. In this article, we tried to introduce some of the important foraminiferal and calcareous algal assemblages of this area.
KeywordsTirgan FormationGhorogh SynclineForaminiferaCalcareous Algae
- Afshar-Harb, A. (1994) Geology of Kopet-Dagh. Geol Survey Iran publ, Vol., 109-124.
- Afshar-Harb, A. (1970) Geology of Sarakhs Area and Khangiran Gas Field. Nat. Iran. Oil Co. Paper Presented at 8th Session of ECAFE Working Party of Senior Geologists, Bandung.
- Afshar-Harb, A. (1969) A Brief History of Geological Exploration and Geology of the Sarakhs Area and the Khangiran Gas Field. The Bulletin of the Iranian Petroleum Institute, 37, 43-262.
- Kalantari, A. (1969) Foraminifera from the Middle Jurassic-Cretaceous Successions of Koppet Dagh Region (NE, Iran). Teheran National Iranian Oil Company, Geol. Labor., Publ, 3, 1-298.
- Arnaud Vanneau, A. and Sliter, W. (1995) Early Cretaceous Shallow-Water Benthic Foraminifers and Fecal Pellets from Leg 143 Compared with Coeval Faunas from the Pacific Basin, Centeral America, and the Tethys. Proceedings of the Ocean Drilling Program, Scientific Results, 143, 537-564. https://doi.org/10.2973/odp.proc.sr.143.252.1995
- Arnaud Vanneau, A., Conard, M., Deloffre, R., et al. (1991) Distribution of Lower Cretaseous Foraminifera and Dasy-cladal Algae of the Adriatic Plate. In: Vlahovic, I. and Velic, I., Eds., Some Aspects of the Shallow Water Sedimentation on the Adriatic Carbonate Platform (Permian to Eocene), Inst. of Geology Zagreb, 22-26.
- Husines, A. and Sokac, B. (2006) Early Cerataceus Benthic Associaitions (Foraminifera and Calcareous Algae) of a Shallow Tropical-Water Platform Environment (Mijet Island, Southern Croatia). Cretaceous Research, 27, 418-441.
- Kuss, J. and Conrad, M. (1991) Calcareous Algae from Cretaceous Carbonates of Egypt, Sinai, and Southern Jordan. Journal of Paleontology, 65, 869-882. https://doi.org/10.1017/S0022336000037847
- Schlagintweit, F. and Dragastan, O. (2004) Pinnatiporidium Untersbergensis N. SP; a New Siphonous Green Alga of the Family Protohalimedaceae Dragastan, Littler & Littler 2002 from the Upper Jurassic of the Northern Calcareous Alps (Austria). Acta palaeontologica Romaniae, 4, 455-462.
- Schroeder, R., Schenk, K., Cherchi, A. and Schwizer, B. (2007) A Sur la Presence de Grands Foraminifers age Aptien Superieur Dans l Urgonien de la Napped u Wildhorn (Suisse Centrale). Note Preliminaire. Revue de paleobiologie, Geneve, 26, 665-669.
- Taherpour Khalil Abad, M., Aryaei, A., Ashouri, A. and Hosseini, S. (2010) Benthic foraminiferal Assemblages in Tirgan Formation (Urgonien Facies Type), West of Kopet-Dagh Sedimentary Basin, NE of Iran. 1st Int. Applied Geol Congr Dept of Geol, Islamic Azad Univ Mashad Branch, Iran, 26-28 April 2010, 1027-1031.