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Episodes 2018; 41(1): 17-32

Published online March 1, 2018


Copyright © International Union of Geological Sciences.

The Global Stratotype Section and Point (GSSP) for the base of the Chattian Stage (Paleogene System, Oligocene Series) at Monte Cagnero, Italy

Rodolfo Coccioni1*, Alessandro Montanari2, David Bice3, Henk Brinkhuis4, Alain Deino5, Fabrizio Frontalini1, Fabrizio Lirer6, Patrizia Maiorano7, Simonetta Monechi8, Jörg Pross9, Pierre Rochette10, Leonardo Sagnotti11, Marianna Sideri1, Mario Sprovieri12, Fabio Tateo13, Yannick Touchard10, Stefaan Van Simaeys14, and Graham L. Williams15

1Dipartimento di Scienze Pure e Applicate (DiSPeA) dell’Università degli Studi “Carlo Bo,” Campus Scientifico, Località Crocicchia, 61029, Urbino, Italy; *Corresponding author, E-mail: rodolfo.coccioni@uniurb.it
2Osservatorio Geologico di Coldigioco, 62020 Frontale di Apiro, Italy
3Department of Geosciences, the Pennsylvania State University, University Park, Pennsylvania 16802, USA
4Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands
5Berkeley Geochronology Center, 2453 Ridge Road, Berkeley, California 94709, USA
6Istituto per l’Ambiente Marino Costiero (IAMC-CNR), Calata Porta di Massa, Interno Porto di Napoli, 80123 Napoli, Italy
7Dipartimento di Scienze della Terra e Geoambientali dell’Università degli Studi di Bari, Via Orabona 4, 70125 Bari, Italy
8Dipartimento di Scienze della Terra dell’Università degli Studi di Firenze, Via La Pira 4, 50121 Firenze, Italy
9Paleoenvironmental Dynamics Group, Institute of Earth Sciences, University of Heidelberg, Im Neuenheimer Feld 234, 69120 Heidelberg, Germany
10Université d’Aix Marseille 3, UMR CNRS 6635, CEREGE Europole de l’Arbois BP80 13545 Aix en Provence Cedex 4, France
11Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Roma, Italy
12Istituto per l’Ambiente Marino Costiero (IAMC-CNR), Via del Mare 3, 91021 Torretta Granitola, Italy
13Dipartimento di Geoscienze e Georisorse-CNR, Via Gardenigo 6, 35131 Padova, Italy
14Exxon Mobil Upstream Research Company 22777 Springwood Village Pkwy, EMHC S1.2B.315 Houston, TX 77389, USA
15Geological Survey of Canada, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, Nova Scotia, B2Y 4A2, Canada

Correspondence to:E-mail: rodolfo.coccioni@uniurb.it

Received: April 11, 2017; Revised: August 24, 2017; Accepted: August 24, 2017

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 GSSP for the base of the Chattian Stage (Paleogene System, Oligocene Series) is defined at meter level 197 in the Monte Cagnero section, which belongs to the pelagic succession of the Umbria–Marche basin (Urbania, central Italy: 43°38′47.81″N–12°28′03.83″E). This level with an astronomical age of 27.82 Ma coincides with the highest common occurrence of the planktonic foraminifer Chiloguembelina cubensis at the base of planktonic foraminiferal O5 Zone and falls in the upper part of calcareous nannofossil NP24 Zone, in the lower part of dinocyst Dbi Zone, and in the lower Chron C9n. The proposal was approved by the International Subcommission of Paleogene Stratigraphy in July 2015, approved by the International Commission of Stratigraphy in August 2016, and ratified by the International Union of Geological Sciences in September 2016.