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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 Coccioni, R.; Marsili, A.; Montanari, A.; Bellanca, A.; Neri, R.; Bice, D.M.; 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, G.L. (2008). 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. Geol. Soc. Am. Bull. 120(3-4): 487-511. dx.doi.org/10.1130/B25988.1 In: Geological Society of America bulletin. GEOLOGICAL SOC AMER, INC: New York, N.Y.. ISSN 0016-7606; e-ISSN 1943-2674

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 279774 [ download pdf ]

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Trefwoord

Marien/Kust

Author keywords

Integrated stratigraphy; Oligocene; Rupelian/Chattian boundary; Umbria-Marche Apennines; central Italy

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Auteurs		Top
Coccioni, R. Marsili, A. Montanari, A. Bellanca, A. Neri, R. Bice, D.M. 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, G.L.

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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.

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