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Communication of IUGS Geological Standards

Episodes 2023; 46(3): 451-490

Published online September 1, 2023


Copyright © International Union of Geological Sciences.

The Global Boundary Stratotype Section and Point (GSSP) of the Campanian Stage at Bottaccione (Gubbio, Italy) and its Auxiliary Sections: Seaford Head (UK), Bocieniec (Poland), Postalm (Austria), Smoky Hill, Kansas (U.S.A), Tepayac (Mexico)

Andy Gale1,2*, Sietske Batenburg3, Rodolfo Coccioni4, Zofia Dubicka5, Elisabetta Erba6, Francesca Falzoni6, Jim Haggart7, Takishi Hasegawa8, Christina Ifrim9, Ian Jarvis10, Hugh Jenkyns11, Agata Jurowska12, Jim Kennedy 11,13, Matteo Maron, Giovanni Muttoni6, Martin Pearce2, Maria Rose Petrizzo6, Isabella Premoli-Silva6, Nicolas Thibault14, Silke Voigt15, Michael Wagreich16, Irek Walaszczyk5

1 School of the Environment, Geography and Geological Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth PO13QL UK
2 Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW75BD UK
3 Departament de Dinamica de la Terra i de l’Ocea, Facultat di Ciences de la Terra, Universitat de Barcelona, 08028 Barcelona, Spain
4 Dipartimento di Scienze della Terra, della Vita e dell’Ambiente, Università degli Studi di Urbino “Carlo Bo”, Campus Scientifico “E. Mattei”, 61029 Urbino, Italy
5 Faculty of Geology, University of Warsaw, Al. Zwirki i Wigury 93, 02–089 Warszawa, Poland
6 Dipartimento di Scienze della Terra “A. Desio”, Università degli Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy
7 Geological Survey of Canada, 1500–605 Robson Street, Vancouver, BC V6B 5J3 Canada
8 Department of Earth Sciences, Faculty of Science, Kanazawa University, Kakuma–machi, Kanazawa 920–1192, Japan
9 SNSB Jura Museum, Eichstatt, Germany
10 Department of Geography, Geology and the Environment, Kingston University London, Kingston upon Thames KT1 2EE, UK
11 Department of Earth Sciences, South Parks Road, Oxford OX13AN, UK
12 Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30–059 Krakow, Poland
13 Oxford University Museum of Natural History, Parks Road, Oxford OX13PW, UK
14 Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen K, Denmark
15 Institute of Geosciences, Goethe–University Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
16 Department of Geology, University of Vienna, Althanstrasse 14, Vienna, A–1090, Austria

Correspondence to:*E-mail: andy.gale@port.ac.uk
§now at: Dipartimento di Ingegneria e Geologia, Università degli Studi “G. D’Annunzio” di Chieti–Pescara, via dei Vestini 31, 66100 Chieti, Italy
Additional Working Group members are: Elise Chenot (University of Bourgogne, Dijon, France) and Mario Sprovieri (Istituto per l’Ambiente, Capo Granitola, Italy).

Received: October 12, 2022; Revised: December 27, 2022; Accepted: December 27, 2022

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 the unanimous vote of the Executive Committee of International Union of Geological Sciences in October 2022, the Global boundary Stratotype Section and Point for the base of the Campanian Stage is confirmed as the magnetic polarity reversal from Chron 34n (top of the Long Cretaceous Normal Polarity–Chron) to Chron C33r at the 221.53 m level in the Bottaccione Gorge section at Gubbio, Umbria–Marche Basin, Italy. This event has been widely identified in oceanic settings and in widespread onshore outcrops. Sedimentation across the Santonian– Campanian boundary interval in the proposed GSSP appears to be continuous, supported by evidence from the carbon isotope record and complete micro– and nannofossil biostratigraphy. The succession comprises deep–water cherty limestones (mudstones and foraminiferal wackestones) which provide a detailed record of calcareous nannofossils and planktonic foraminifera and yields an excellent palaeomagnetic record. The high–resolution carbon isotope record, derived from bulk sediment, provides an important additional means of correlation to other regions.