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Communication of IUGS Geological Standards

Episodes 2022; 45(2): 181-220

Published online June 1, 2022


Copyright © International Union of Geological Sciences.

The Global Boundary Stratotype Section and Point (GSSP) for the base of the Coniacian Stage (Salzgitter-Salder, Germany) and its auxiliary sections (Słupia Nadbrzeżna, central Poland; Střeleč, Czech Republic; and El Rosario, NE Mexico)

Ireneusz Walaszczyk1*, Stanislav Čech2, James S. Crampton3, Zofia Dubicka1, Christina Ifrim4, Ian Jarvis5, William J. Kennedy6, 7, Jackie A. Lees8, Damian Lodowski1, Martin Pearce9, Danuta Peryt10, Bradley B. Sageman11, Poul Schiøler12, Jordan Todes1,13, David Uličný14,15, Silke Voigt16, Frank Wiese17,18, With contributions by Christian Linnert19, Tobias Püttmann20, Seiichi Toshimitsu21

1 Faculty of Geology, University of Warsaw, Al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
2 Czech Geological Survey, Klárov 3/131, 118 21 Praha 1, Czech Republic
3 School of Geography, Environment and Earth Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand
4 SNSB Jura-Museum, Willbaldsburg, Burgstr. 19, 85072 Eichstätt, Germany
5 Department of Geography, Geology and the Environment, Kingston University London, Kingston upon Thames KT1 2EE, UK
6 Museum of Natural History, Oxford University, Parks Road, Oxford OX1 3PW, UK
7 Department of Earth Sciences, Oxford University, South Parks Road, Oxford OX1 3AN, UK
8 Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UK
9 Evolution Applied Limited, 33 Gainsborough Drive, Sherborne, Dorset DT9 6DS, United Kingdom
10 Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland
11 Department of Earth and Planetary Sciences, Northwestern University, 2145 Sheridan Avenue, 60201 Evanston, Illinois, USA
12 MGPalaeo, Unit 1/5, Arvida Street, Malaga, WA 6090, Australia
13 Department of Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue, 60637 Chicago, Illinois, USA
14 Institute of Geophysics, Czech Academy of Sciences, Boční II/1401, 141 31 Praha 4, Czech Republic
15 Institute of Geology and Paleontology, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
16 Institute of Geosciences, Goethe University Frankfurt, Altenhöferallee 1, 60438 Frankfurt, Germany
17 Department of Geobiology, Geoscience Centre, Georg-August-Universität Göttingen, Germany
18 Institute of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234-236, 69120 Heidelberg, Germany
19 Vogelstraße 6a, 44869 Bochum, Germany
20 Institute of Geology, Mineralogy and Geophysics, Ruhr University Bochum, 44780 Bochum, Germany
21 Geological Survey of Japan, AIST, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan

Correspondence to:*E-mail: i.walaszczyk@uw.edu.pl

Received: July 7, 2021; Revised: August 2, 2021; Accepted: August 2, 2021

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.


Following votes in the Coniacian Working Group, the Cretaceous Subcommission and the International Commission on Stratigraphy, on May 1st, 2021, the International Union of Geological Sciences voted unanimously to ratify the Global Stratotype Section and Point (GSSP) proposal for the base of the Coniacian Stage of the Upper Cretaceous Series and Cretaceous System. The lower boundary of the Coniacian Stage is placed at the base of Bed 46 of the Salzgitter-Salder section in northern Germany. The boundary is defined by the first appearance of the inoceramid bivalve species Cremnoceramus deformis erectus (Meek) and complemented by the Navigation carbon isotope event. Additional data include the bivalve genus Didymotis, foraminifera, ammonite, nannofossil and organic-walled dinoflagellate cyst events. Three auxiliary sections (Słupia Nadbrzeżna, central Poland; Střeleč, Czech Republic; El Rosario, NE Mexico) supplement the details of the boundary record in various facies, and in differing geographic and biogeographic contexts.