The Hirnantian δ13C Positive Excursion in the Nabiullino Section (South Urals)


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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.

作者简介

R. Yakupov

Institute of Geology, Ufa Science Center

编辑信件的主要联系方式.
Email: stral@ufaras.ru
俄罗斯联邦, Ufa, 450077

T. Mavrinskaya

Institute of Geology, Ufa Science Center

Email: stral@ufaras.ru
俄罗斯联邦, Ufa, 450077

I. Smoleva

Institute of Geology, Komi Science Center, Ural Branch

Email: stral@ufaras.ru
俄罗斯联邦, Syktyvkar, 167000

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