Integrated stratigraphy of the Oligocene pelagic sequence in the Umbria-Marche basin (northeastern Apennines, Italy): A potential Global Stratotype Section and Point (GSSP) for the Rupelian/Chattian boundary

Rodolfo Coccioni, Andrea Marsili, Alessandro Montanari, Adriana Bellanca, Rodolfo Neri, David M. Bice, Henk Brinkhuis, Nathan Church, Alison Macalady, Aaron McDaniel, Alain Deino, Fabrizio Lirer, Mario Sprovieri, Patrizia Maiorano, Simonetta Monechi, Claudio Nini, Marisa Nocchi, Jörg Pross, Pierre Rochette, Leonardo SagnottiFabio Tateo, Yannick Touchard, Stefaan Van Simaeys, Graham L. Williams

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The Oligocene represents an important time period from a wide range of perspectives and includes significant climatic and eustatic variations. The pelagic succession of the Umbria-Marche Apennines (central Italy) includes a complete and continuous sequence of marly limestones and marls, with volcaniclastic layers that enable us to construct an integrated stratigraphic framework for this time period. We present here a synthesis of detailed biostratigraphic, magnetostratigraphic, and chemostratigraphic studies, along with geochronologic results from several biotite-rich volcaniclastic layers, which provide the means for an accurate and precise radiometric calibration of the Oligocene time scale. From this study, the interpolated ages for the Rupelian/Chattian stage boundary, located in the upper half of Chron 10n at meter level 188 in the Monte Cagnero section, and corresponding to the O4/O5 planktonic foraminiferal zonal boundary, are 28.36 Ma (paleomagnetic interpolation), 28.27±0.1 Ma (direct radioisotopic dating), and 27.99 Ma (astrochronological interpolation). These ages appear to be slightly younger than those reported in recent chronostratigraphic time scale compilations. The Monte Cagnero section is a potential candidate for defining the Chattian Global Stratotype Section and Point (GSSP) and some reliable criteria are here proposed for marking the Rupelian/ Chattian boundary according to International Union of Geological Sciences (IUGS) recommendations.

Original languageEnglish (US)
Pages (from-to)487-511
Number of pages25
JournalBulletin of the Geological Society of America
Volume120
Issue number3-4
DOIs
StatePublished - Mar 2008

All Science Journal Classification (ASJC) codes

  • Geology

Fingerprint Dive into the research topics of 'Integrated stratigraphy of the Oligocene pelagic sequence in the Umbria-Marche basin (northeastern Apennines, Italy): A potential Global Stratotype Section and Point (GSSP) for the Rupelian/Chattian boundary'. Together they form a unique fingerprint.

Cite this