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

Autor: Henk Brinkhuis, Adriana Bellanca, David M. Bice, Rodolfo Neri, Claudio Nini, Alison Macalady, Fabrizio Lirer, Fabio Tateo, Leonardo Sagnotti, Stefaan Van Simaeys, Yannick Touchard, Jörg Pross, Alain Deino, Graham L. Williams, Aaron McDaniel, Alessandro Montanari, Mario Sprovieri, Andrea Marsili, Simonetta Monechi, Pierre Rochette, Marisa Nocchi, Patrizia Maiorano, Nathan Church, Rodolfo Coccioni
Přispěvatelé: COCCIONI R, MARSILI A, MONTANARI A, BELLANCA A, NERI R, BICE DM, BRINKHUIS H, CHURCH N, MACALADY A, MCDANIEL A, DEINO A, LIRER F, SPROVIERI M, MAIORANO P, MONECHI S, NINI C, NOCCHI M, PROSS J, ROCHETTE P, SAGNOTTI L, TATEO F, TOUCHARD Y, VAN SIMAEYS S, WILLIAMS GL
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Geological Society of America bulletin 120 (2008): 487–511. doi:10.1130/B25988.1
info:cnr-pdr/source/autori:R. COCCIONI, A. MARSILI, A. MONTANARI, A. BELLANCA, NERI R., D.M. BICE, H. BRINKHUIS, N. CHURCH, A.MACALADY A., A. MCDANIEL, DEINO, F. LIRER, M. SPROVIERI, P. MAIORANO, S. MONECHI, C. NINI, M. NOCCHI, J. PROSS, P. ROCHETTE, L. SAGNOTTI, F. TATEO, Y. T/titolo:Integrated stratigraphy of the Oligocene pelagic sequence in the Umbria-Marche basin (north-eastern Apennines, Italy): A potential Global Stratotype Section and Point (GSSP) for the Rupelian%2FChattian boundary/doi:10.1130%2FB25988.1/rivista:Geological Society of America bulletin/anno:2008/pagina_da:487/pagina_a:511/intervallo_pagine:487–511/volume:120
Popis: The Oligocene represents an important time period from a wide range of perspectives and includes signifi cant 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 hemostratigraphic 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 defi ning 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.
Databáze: OpenAIRE
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