TY - JOUR
T1 - Integrated stratigraphy of the Oligocene pelagic sequence in the Umbria-Marche basin (northeastern Apennines, Italy)
T2 - A potential Global Stratotype Section and Point (GSSP) for the Rupelian/Chattian boundary
AU - Coccioni, Rodolfo
AU - Marsili, Andrea
AU - Montanari, Alessandro
AU - Bellanca, Adriana
AU - Neri, Rodolfo
AU - Bice, David M.
AU - Brinkhuis, Henk
AU - Church, Nathan
AU - Macalady, Alison
AU - McDaniel, Aaron
AU - Deino, Alain
AU - Lirer, Fabrizio
AU - Sprovieri, Mario
AU - Maiorano, Patrizia
AU - Monechi, Simonetta
AU - Nini, Claudio
AU - Nocchi, Marisa
AU - Pross, Jörg
AU - Rochette, Pierre
AU - Sagnotti, Leonardo
AU - Tateo, Fabio
AU - Touchard, Yannick
AU - Van Simaeys, Stefaan
AU - Williams, Graham L.
PY - 2008/3
Y1 - 2008/3
N2 - 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.
AB - 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.
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U2 - 10.1130/B25988.1
DO - 10.1130/B25988.1
M3 - Article
AN - SCOPUS:44449175033
VL - 120
SP - 487
EP - 511
JO - Bulletin of the Geological Society of America
JF - Bulletin of the Geological Society of America
SN - 0016-7606
IS - 3-4
ER -