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Communication of IUGS Geological Standards

Episodes 2023; 46(4): 623-651

Published online December 1, 2023


Copyright © International Union of Geological Sciences.

Global Stratotype Section and Point (GSSP) for the base-Artinskian Stage (Lower Permian)

Valery V. Chernykh1, Charles M. Henderson2*, Ruslan V. Kutygin3, Tatiana V. Filimonova4, Guzal M. Sungatullina5, Marina S. Afanasieva6, Tatiana N. Isakova7, Rafael Kh. Sungatullin5, Michael H. Stephenson8, Lucia Angiolini9, Boris I. Chuvashov4

1 Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Pochtovyi per. 7, Yekaterinburg, 620219, Russia
2 Department of Geoscience, University of Calgary, Calgary, Alberta, Canada T2N 1N4
3 Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences (DPMGI SB RAS), Lenina ave., 39, Yakutsk, 677007, Russia
4 Geological Institute of the Russian Academy of Sciences (GIN RAS), Pyzhevsky lane, 7, Moscow, 119017, Russia
5 Kazan Federal University (KFU), Kremlyovskaya str, 18, Kazan 420008, Russia
6 Paleontological Institute of Russian Academy of Sciences (PIN PAS), Profsoyuznaya, str. 123, Moscow, 117647, Russia
7 Geological Institute of the Russian Academy of Sciences (GIN RAS), Pyzhevsky lane, 7, Moscow, 119017, Russia
8 Stephenson Geoscience Consulting Ltd., 14 Thelda Avenue, Keyworth, Nottingham, NG125HU, UK; British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
9 Dipartimento di Scienze della Terra “A. Desio”, Università degli Studi di Milano, 20133 Milano, Italy

Correspondence to:*E-mail: cmhender@ucalgary.ca

Received: February 22, 2022; Revised: May 5, 2023; Accepted: May 5, 2023

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


The base-Artinskian Stage GSSP is defined at 0.6 m above the base of bed 4b at the Dal’ny Tulkas section in the southern Urals of Russia (53.88847N and 056.51615E). This point corresponds to the First Appearance Datum of the conodont Sweetognathus asymmetricus, which is part of a well-defined and widely distributed lineage. Additional markers for correlation include a radioisotopic age interpolated between 290.1 and 290.5 Ma, a strontium isotopic ratio of .70767, and many additional fossils groups, particularly ammonoids and fusulines, but also including small foraminiferans, radiolarians, and palynomorphs. Finally, the boundary occurs within a transgressive succession, near, or at a maximum flooding surface in many sections, thereby forming a distinctive sequence stratigraphic signature in the field. The Artinskian Stage is the third stage of the Lower Permian or Cisuralian Series.