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Istituto di Geologia e Centro di Geobiologia dell’Università degli Studi “Carlo Bo,” Campus Scientifi co, Località Crocicchia, 61029 Urbino, Italy
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- PublicationRestrictedAstronomical calibration of the middle Eocene Contessa Highway section (Gubbio, Italy)(2010)
; ; ; ; ; ; ;Jovane, L.; Geology Department, Western Washington University, 516 High Street, 98225, Bellingham, WA, USA ;Sprovieri, M.; Istituto Ambiente Marino Costiero (CNR), Via del Faro, 3 Torretta Granitola, (Fraz. Campobello di Mazara) 91021, Trapani, Italy ;Coccioni, R.; Dipartimento di Scienze dell'Uomo, dell'Ambiente e della Natura, Università degli Studi di Urbino “Carlo Bo”, Campus Scientifico, Località Crocicchia, 61029 Urbino, Italy ;Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Marsili, A.; Dipartimento di Scienze dell'Uomo, dell'Ambiente e della Natura, Università degli Studi di Urbino “Carlo Bo”, Campus Scientifico, Località Crocicchia, 61029 Urbino, Italy ;Laskar, J.; Astronomie et Systèmes Dynamiques, IMCCE, Observatoire de Paris, 77 Avenue Denfert-Rochereau, 75014 Paris, France; ; ; ; ; The Eocene climatic system experienced an important transition from warm Paleocene greenhouse to icehouse Oligocene conditions.This transition could first appear as a long-term cooling trend but, at an up-close look, this period is a complex combination of climatic events and,for most of them, causes and consequences are still not fully characterized. In this context, a study has been carried out on the middle Eocene sedimentary succession of the Contessa Highway section, central Italy, which is proposed as the Global Stratotype Section and Point(GSSP)for the Lutetian/Bartonian boundary at the top of the Chron 19n, with an astronomically calibrated age of 41.23 Ma. Through a cyclostratigraphic analysis of the rhythmic sedimentary alternations and combination with the results of time series analysis of the proxy record, we provide an orbital tuning of the middle Eocene and astronomical calibration of the bio-magnetostratigraphic events (particularly for the C19n/C18r Chronboundary) recognized at the Contessa Highway section.317 28 - PublicationOpen AccessThe middle Eocene climatic optimum (MECO) event in the(2006)
; ; ; ; ; ; ; ; ;Jovane, L.; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143, Rome, Italy ;Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143, Rome, Italy ;Coccioni, R.; Istituto di Geologia e Centro di Geobiologia, Università degli Studi di Urbino “Carlo Bo”, ;Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143, Rome, Italy ;Marsili, A.; Istituto di Geologia e Centro di Geobiologia, Università degli Studi di Urbino “Carlo Bo”, ;Monechi, S.; Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via La Pira 4, 50121, ;Roberts, A.; National Oceanography Centre, Southampton, University of Southampton, European Way, ;Sprovieri, M.; Istituto Ambiente Marino Costiero (CNR), Calata Porta di Massa (Interno Porto di Napoli),; ; ; ; ; ; ; We report a high-resolution paleomagnetic investigation constrained by new qualitative and semi-quantitative analyses of planktic and benthic foraminifera, nannofossil assemblages, integrated with oxygen and carbon isotope measurements, for the middle Eocene Scaglia limestones of the Contessa Highway section, central Italy. Calcareous plankton assemblages enables recognition of several biostratigraphic events from planktic foraminiferal Zone P11 to the lower part of Zone P15 and from calcareous nannofossil Zone NP15 to the upper part of Zone NP17, which results in refinement of the magnetobiostratigraphy of the Contessa Highway section. Correlation of the paleomagnetic polarity pattern with the geomagnetic polarity timescale provides a direct age interpretation for strata around the middle Eocene Scaglia limestones of the Contessa 2 Highway section, from Chrons C21n (47 Ma) through to Subchron C18n.1n (38.5 Ma). Bulk carbon isotope values indicate a distinct carbon isotopic shift at 40 Ma that is interpreted to represent the first evidence in the northern hemisphere of the middle Eocene climatic optimum that has recently been observed as a stable isotope anomaly in multiple records from the Indian-Atlantic sector of the Southern Ocean. This should demonstrate a global response of carbon cycle to the proposed transient increased pCO2 levels during the late middle Eocene and a consequent global CO2-driven climate change.455 768 - PublicationRestrictedThe middle Eocene climatic optimum (MECO) event in the Contessa Highway section, Umbrian Apennines, Italy(2007-03)
; ; ; ; ; ; ; ; ;Jovane, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Sprovieri, M.; Istituto Ambiente Marino Costiero (CNR) ;Marsili, A.; Universita` degli Studi di Urbino ;Coccioni, R.; Universita` degli Studi di Urbino ;Roberts, A.; National Oceanography Centre, Southampton, ;Monechi, S.; Università degli Studi di Firenze; ; ; ; ; ; ; We report a high-resolution paleomagnetic investigation constrained by new qualitative and semi-quantitative analyses of planktic and benthic foraminifera, nannofossil assemblages, integrated with oxygen and carbon isotope measurements, for the middle Eocene Scaglia limestones of the Contessa Highway section, central Italy. Calcareous plankton assemblages enable recognition of several biostratigraphic events from planktic foraminiferal Zone P11 to the lower part of Zone P15 and from calcareous nannofossil Zone NP15 to the upper part of Zone NP17, which results in refinement of the magnetobiostratigraphy of the Contessa Highway section. Correlation of the paleomagnetic polarity pattern with the geomagnetic polarity timescale provides a direct age interpretation for strata around the middle Eocene Scaglia limestones of the Contessa Highway section, from Chrons C21n (47 Ma) through to Subchron C18n.1n (38.5 Ma). Bulk carbon isotope values indicate a distinct carbon isotopic shift at 40 Ma that is interpreted to represent the first evidence in the northern hemisphere of the middle Eocene climatic optimum (MECO) that has recently been observed as a stable isotope anomaly in multiple records from the Indian-Atlantic sector of the Southern Ocean. This demonstrates a global response of the carbon cycle to the proposed transient increased pCO2 levels during the late middle Eocene and a consequent global CO2-driven climate change.240 35 - PublicationRestrictedIntegrated 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(2008)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Coccioni, R.; Istituto di Geologia e Centro di Geobiologia dell’Università degli Studi “Carlo Bo,” Campus Scientifi co, Località Crocicchia, 61029 Urbino, Italy ;Marsili, A.; Istituto di Geologia e Centro di Geobiologia dell’Università degli Studi “Carlo Bo,” Campus Scientifi co, Località Crocicchia, 61029 Urbino, Italy ;Montanari, A.; Osservatorio Geologico di Coldigioco, 62020 Frontale di Apiro, Italy - Department of Geology, Carleton College, Northfi eld, Minnesota 55057, USA ;Bellanca, A.; Dipartimento di Chimica e Fisica della Terra ed Applicazioni alle Georisorse e ai Rischi Naturali (CFTA), Via Archirafi 36, 90123 Palermo, Italy ;Neri, R.; Dipartimento di Chimica e Fisica della Terra ed Applicazioni alle Georisorse e ai Rischi Naturali (CFTA), Via Archirafi 36, 90123 Palermo, Italy ;Bice, D. M.; Department of Geosciences, the Pennsylvania State University, University Park, Pennsylvania 16802, USA - Osservatorio Geologico di Coldigioco, 62020 Frontale di Apiro, Italy ;Brinkhuis, H.; Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestaan 4, 3584 CD Utrecht, The Netherlands ;Church, N.; Department of Geology, Carleton College, Northfi eld, Minnesota 55057, USA - Osservatorio Geologico di Coldigioco, 62020 Frontale di Apiro, Italy ;Macalady, A.; Department of Geology, Carleton College, Northfi eld, Minnesota 55057, USA - Osservatorio Geologico di Coldigioco, 62020 Frontale di Apiro, Italy ;McDaniel, A.; Department of Geology, Carleton College, Northfi eld, Minnesota 55057, USA - Osservatorio Geologico di Coldigioco, 62020 Frontale di Apiro, Italy ;Deino, A.; Berkeley Geochronology Center, 2453 Ridge Road, Berkeley, California 94709, USA ;Lirer, F.; Istituto Ambiente Marino Costiero (IAMC)–CNR, Calata Porta di Massa, Interno Porto di Napoli, 80123 Napoli, Italy ;Sprovieri, M.; Istituto Ambiente Marino Costiero (IAMC)–CNR, Calata Porta di Massa, Interno Porto di Napoli, 80123 Napoli, Italy ;Maiorano, P.; Dipartimento di Geologia e Geofi sica dell’Università degli Studi di Bari, Via Orabona 4, 70125 Bari, Italy ;Monechi, S.; Dipartimento di Scienze della Terra dell’Università degli Studi di Firenze, Via La Pira 4, 50121 Firenze, Italy ;Nini, C.; Ente Nazionale Idrocarburi (ENI) S.p.A., Exploration and Production Division, Via Emilia 1, 20097 San Donato Milanese, Italy ;Nocchi, M.; Dipartimento di Scienze della Terra dell’Università, Piazza Università 1, 06100 Perugia, Italy ;Pross, J.; Institut für Geowissenschaften, Johann Wolfgang Goethe–Universität Frankfurt, Senckenberganlage 32-34, D-60054 Frankfurt, Germany ;Rochette, P.; Université d’Aix Marseille 3, UMR CNRS 6635, CEREGE Europole de l’Arbois BP80 13545 Aix en Provence Cedex 4, France ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Tateo, F.; Istituto di Geoscienze e Georisorse-CNR, c/o Dipartimento di Geologia, Paleontologia e Geofi sica, Via Giotto 1, 35137 Padova, Italy ;Touchard, Y.; Université d’Aix Marseille 3, UMR CNRS 6635, CEREGE Europole de l’Arbois BP80 13545 Aix en Provence Cedex 4, France ;Van Simaeys, S.; Historical Geology, University of Leuven, Redingenstraat 16, B-3000 Leuven, Belgium ;Williams, G. L.; Geological Survey of Canada, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, Nova Scotia, B2Y 4A2, Canada; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; 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.255 22