Abstract
The upper Sandbian, Katian, and Hirnantian complexes of conodonts in the upper Ordovician section of the western slope of the Southern Urals near the village of Nabiullino were studied. The δ13C positive excursion with a maximum of 3.3‰ associated with the global Hirnantian isotopic event, HICE, was fixed for the first time. This excursion shows the beginning of the Hirnantian stage in the terrigenous–carbonate section of the upper Ordovician in the Southern Urals. It coincides with the first occurrence of the Hirnantian conodont species of Gamachignathus ensifer and the conodonts of shallow-water biophacies, Aphelognathus-Ozarkodina, reflecting the global glacio-eustatic event.
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References
A. I. Antoshkina, in Proc. 3rd All-Russian Conference “Paleozoic of Russia: Regional Stratigraphy, Paleontology, Geological and Biological Events” September 24–28, 2012, St. Petersburg (Karpinsky Russ. Geol. Res. Inst., St. Petersburg, 2012), pp. 18–20 [in Russian].
A. V. Dronov, Stratigraphy in the Early 21st Century–Trends and New Ideas (Geokart, Geos, Moscow, 2013), pp. 65–92 [in Russian].
S. N. Krauze and V. A. Maslov, Ordovician, Silurian, and Lower Devonian of the Western Bashkir Urals (Bashkir Branch USSR Acad. Sci., Ufa, 1961) [in Russian].
T. M. Mavrinskaya and R. R. Yakupov, in Proc. 3rd All-Russian Conference “Paleozoic of Russia: Regional Stratigraphy, Paleontology, Geological and Biological Events” September 24–28, 2012, St. Petersburg (Karpinsky Russ. Geol. Res. Inst., St. Petersburg, 2012), pp. 131–133 [in Russian].
T. Yu. Tolmacheva, A. V. Ryazantsev, and A. A. Belova, in Proc. Paleostrat-2011. Ann. Meet. Moscow Soc. Nat. Moscow Br. Paleontol. Soc. Russ. Acad. Sci. (Moscow, 2011), pp. 67–69.
R. R. Yakupov, Nov. Paleontol. Stratigr. 49 (10–11), 184–186 (2008).
R. R. Yakupov, T. M. Mavrinskaya, and A. N. Abramova, Stratigraphical Sectional Plane of Northern Part of Zilair Synclinorium: Paleontological Foundation (Zavaritsky Inst. Geol. Geochem. Ural Br. Russ. Acad. Sci., Yekaterinburg, 2002) [in Russian].
B. U. Haq and S. R. Schutter, Science 322, 64–68 (2008).
D. Kaljo, L. Hints, O. Hints, T. Martma, and J. Nõlvak, Acta Univ. Carol., Geol. 43 (112), 507–510 (1998).
The Geologic Time Scale 2012, Ed. by F. M. Gradstein, J. G. Ogg, M. D. Schmitz, and G. M. Ogg (Elsevier, Amsterdam, 2012), Vols. 1–2, Chap. 18.
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Original Russian Text © R.R. Yakupov, T.M. Mavrinskaya, I.V. Smoleva, 2018, published in Doklady Akademii Nauk, 2018, Vol. 478, No. 6, pp. 679–682.
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Yakupov, R.R., Mavrinskaya, T.M. & Smoleva, I.V. The Hirnantian δ13C Positive Excursion in the Nabiullino Section (South Urals). Dokl. Earth Sc. 478, 199–203 (2018). https://doi.org/10.1134/S1028334X18020307
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DOI: https://doi.org/10.1134/S1028334X18020307