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Conodonts from the Niur Formation (Silurian) of the Derenjal Mountains, Central Iran

  • P. MÄNNIK (a1), C. G. MILLER (a2) and V. HAIRAPETIAN (a3)
Abstract
Abstract

A Llandovery to Ludlow age for the Niur Formation in the Derenjal Mountains (east-central Iran) is proposed based on new conodont data and previous work on other fossils. The uppermost part of the studied section yielded no diagnostic conodonts but may be Pridoli in age. Some intervals can be dated more precisely: Unit 11 (at least its upper part) is middle Telychian in age and corresponds to the Pterospathodus amorphognathoides lennarti Zone; the lowermost part of Unit 16 is earliest Ludlow in age and corresponds to the Kockelella crassa Zone; the uppermost Unit 16 is late Ludlow (Ludfordian) in age and corresponds to the Ozarkodina snajdri Interval Zone. The Llandovery–Wenlock boundary lies between units 12 and 13 based on sedimentological evidence. The precise location of the Wenlock–Ludlow boundary in the section is not clear but lies below Unit 16. Present-day Iran was located far away from Baltica and Laurentia, on the other side of the Rheic Ocean. This ocean does not seem to have been a major migration barrier for most organisms including the conodonts.

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Corresponding author
Author for correspondence: mannik@gi.ee
References
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Branson E. B. & Mehl M. G. 1933. Conodonts from the Bainbridge Formation (Silurian) of Missouri. University of Missouri Studies 8, 3952.
Bruton D. L., Wright A. J. & Hamedi M. A. 2004. Ordovician trilobites of Iran. Palaeontographica A 271, 111–49.
Calner M. & Jeppsson L. 2003. Carbonate platform evolution and conodont stratigraphy during the middle Silurian Mulde Event, Gotland, Sweden. Geological Magazine 140, 173203.
Carls P., Slavík L. & Valenzuela-Ríos J. I. 2007. Revisions of conodont biostratigraphy across the Silurian–Devonian boundary. Bulletin of Geosciences 82, 145–64.
Cocks L. R. M. & Torsvik T. H. 2002. Earth geography from 500 to 400 million years ago: a faunal and palaeomagnetic review. Journal of the Geological Society, London 159, 631–44.
Corradini C. & Serpagli E. 1999. A Silurian conodont biozonation from late Llandovery to end Přidoli in Sardinia (Italy). Bollettino della Società Paleontologica Italiana 37, 255–73.
Cramer B. D., Davies J. R., Ray D. C., Thomas A. T. & Cherns L. 2011 a. Siluria revisited: an introduction. In Siluria Revisited: A Field Guide. International Subcommission on Silurian Stratigraphy, Field Meeting 2011 (ed. Ray D. C.), pp. 728. International Subcommission on Silurian Stratigraphy.
Cramer B. D., Brett C. E., Melchin J. M., Männik P., Kleffner M. A., McLaughlin P. I., Loydell D. K., Munnecke A., Jeppsson L., Corradini C., Brunton F. R. & Saltzman M. R. 2011 b. Revised correlation of Silurian Provincial Series of North America with global and regional chronostratigraphic units and δ13Ccarb chemostratigraphy. Lethaia 44, 185202.
Flügel E. 1969. Stromatoporen aus dem Silur des östlichen Iran. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte 1969/4, 209–19.
Flügel H. W. & Hubmann B. 1993. Paläontologie und Plattentektonik am Beispiel proto- und paläotethyder Korallenfaunen. Jahrbuch der Geologischen Bundesanstalt 136, 2737.
Flügel H. W. & Saleh H. 1970. Die paläozoischen Korallenfauna Ost-irans. 1 Rugose Korallen der Niur Formation (Silur). Jahrbuch der Geologischen Bundesanstalt 113, 267302.
Ghavidel-syooki M., Álvaro J. J., Popov L., Ghobadi Pour M., Ehsani M. H. & Suyarkova A. 2011. Stratigraphic evidence for the Hirnantian (latest Ordovician) glaciation in the Zagros Mountains, Iran. Palaeogeography, Palaeoclimatology, Palaeoecology 307, 116.
Ghavidel-syooki M. & Winchester-Seeto T. 2004. Chitinozoan biostratigraphy and palaeogeography of Lower Silurian strata (Sarchahan Formation) in the Zagros Basin of southern Iran. In Palaeontological and Micropalaeontological Studies in Honour of Geoffrey Playford (eds Laurie J. R. & Foster B. C.), pp. 161–82. Memoirs of the Association of Australasian Palaeontologists 29.
Ghobadi Pour M., Williams M., Vannier J., Meidla T. & Popov L. E. 2006. Ordovician records from east central Iran. Acta Palaeontologica Polonica 51, 551–60.
Hairapetian V., Blom H. & Miller C. G. 2008. Silurian thelodonts from the Niur Formation, central Iran. Acta Palaeontologica Polonica 53, 8595.
Hairapetian V., Ghobadi Pour M., Popov L. & Modzalevskaya T. L. 2012. Stegocornu and associated brachiopods from the Silurian (Llandovery) of Central Iran. Estonian Journal of Earth Sciences 61, 82104.
Hairapetian V., Mohibullah M., Tilley L. J., Williams M., Miller C. G., Afzal J., Ghobadi Pour M. & Hassan Hejazi S. 2011. Early Silurian carbonate platform ostracods from Iran: a peri-Gondwanan fauna with strong Laurentian affinities. Gondwana Research 20, 645–53.
Hamedi M. A., Wright A. J., Aldridge R. J., Boucot A. J., Bruton D. L., Chatterton B. D. E., Jones P., Nicoll R. S., Rickards R. B. & Ross J. R. P. 1997. Cambrian to Silurian of East−Central Iran: new biostratigraphic and biogeographic data. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte 7, 412–24.
Hubmann B. 1991 a. Halysitidae aus dem tiefen Silur E-Irans (Niur-Formation). Jahrbuch der Geologischen Bundesanstalt 134, 711–33.
Hubmann B. 1991 b. Silurian Catenipora Lamarck – a guide to ancient latitudinal and faunal relationships. Anzeiger der Österreichischen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse 128, 113–20.
Jeppsson L. 1997. A new latest Telychian, Sheinwoodian and Early Homerian (Early Silurian) Standard Conodont Zonation. Transactions of the Royal Society of Edinburgh: Earth Sciences 88, 91114.
Jeppsson L. 1998. Silurian oceanic events: summary of general characteristics. In Silurian Cycles: Linkages of Dynamic Stratigraphy with Atmospheric, Oceanic and Tectonic Changes (eds Landing E. & Johnson M. E.), pp. 239–57. New York State Museum Bulletin 491.
Jeppsson L. & Aldridge R. J. 2000. Ludlow (late Silurian) oceanic episodes and events. Journal of the Geological Society, London 157, 1137–48.
Jeppsson L., Eriksson M. E. & Calner M. 2006. A latest Llandovery to latest Ludlow high-resolution biostratigraphy based on the Silurian of Gotland – a summary. GFF 128, 109–14.
Loydell D. K., Nestor V. & Männik P. 2010. Integrated biostratigraphy of the lower Silurian of the Kolka-54 core, Latvia. Geological Magazine 147, 253–80.
Lüning S., Craig J., Loydell D. K., Štorch P. & Fitches B. 2000. Lower Silurian ‘hot shales’ in North Africa and Arabia: regional distribution and depositional model. Earth-Science Reviews 49, 121200.
Mabillard J. E. & Aldridge R. J. 1983. Conodonts from the Coralliferous Group (Silurian) of Marloes Bay, South-West Dyfed, Wales. Geologica et Palaeontologica 17, 2943.
Männik P. 1994. Conodonts from the Pusku Quarry, lower Llandovery, Estonia. Proceedings of Estonian Academy of Sciences, Geology 43, 183–91.
Männik P. 1998. Evolution and taxonomy of the Silurian conodont Pterospathodus. Palaeontology 41, 1001–50.
Männik P. 2007 a. An updated Telychian (Late Llandovery, Silurian) conodont zonation based on Baltic faunas. Lethaia 40, 4560.
Männik P. 2007 b. Some comments on the Telychian–early Sheinwoodian conodont faunas, events and stratigraphy. Acta Palaeontologica Sinica 46 (Suppl.), 305–10.
Männik P., Loydell D. & Lubeseder S. 2011. Sheinwoodian (Silurian) conodonts and graptolites from NE Anti-Atlas, Morocco. Lethaia 44, 410–16.
Meidla T. 1996. Late Ordovician ostracodes of Estonia. Fossilia Baltica 2, 1222.
Melnikova L. M. & Michailova E. D. 1999. Late Ashgill–Early Llandovery ostracodes from the Zeravshan–Gissar mountainous region (Shakhriomon-II reference section): Platycopida, Metacopida and Podocopida. Paleontological Journal 33, 392402.
Murphy M. A., Valenzuela-Ríos J. I. & Carls P. 2004. On classification of Přidoli (Silurian)–Lochkovian (Devonian) Spathognathontidae (conodonts). University of California, Riverside Campus Museum Contribution 6, 125.
Neckaja A. I. 1958. New species and genera of ostracodes of the Ordovician and Silurian of the Russian platform. Trudy VNIGRI 115, 349–73 [in Russian].
Purnell M. A., Donoghue P. C. J. & Aldridge R. J. 2000. Orientation and anatomical notation in conodonts. Journal of Paleontology 74, 113–22.
Rickards R. B., Wright A. J. & Hamedi M. A. 2000. Late Ordovician and Early Silurian graptolites from southern Iran. Records of the Western Australian Museum, Supplement 58, 103–22.
Ruban D. A., Al-Husseini M. I. & Iwasaki Y. 2007. Review of Middle East Paleozoic plate tectonics. GeoArabia 12, 3556.
Ruttner A., Nabavi M. H. & Hajian J. 1968. Geology of the Shirgesht area (Tabas area, East Iran). Geological Survey of Iran, Reports 4, 1133.
Viira V. 1994. A new upper Silurian conodont species from Estonia. Proceedings of Estonian Academy of Sciences, Geology 43, 32–7.
Viira V. 1999. Late Silurian conodont biostratigraphy in the northern East Baltic. Bollettino della Società Paleontologica Italiana 37, 299310.
Weddige K. 1984. Zur stratigraphy und paläontologie des Devons und Carbons von NE-Iran. Senckenbergiana Lethaea 65, 179224.
Wendt J., Kaufmann B., Belka Z., Farsan N. & Karimi Bavandpur A. 2002. Devonian/Lower Carboniferous stratigraphy, facies patterns and palaeogeography of Iran. Part I. Southeastern Iran. Acta Geologica Polonica 52, 129–68.
Wendt J., Kaufmann B., Belka Z., Farsan N. & Karimi Bavandpur A. 2005. Devonian/Lower Carboniferous stratigraphy, facies patterns and palaeogeography of Iran. Part II. Northern and central Iran. Acta Geologica Polonica 55, 3197.
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