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)

1 School of the Environment, Geography and Geological Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth PO13QL UK; *Corresponding author, E-mail:andy.gale@port.ac.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 now at: Dipartimento di Ingegneria e Geologia, Università degli Studi “G. D’Annunzio” di Chieti–Pescara, via dei Vestini 31, 66100 Chieti, Italy