The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy
We report a high-resolution paleomagnetic investigation constrained by new qualitative and semiquantitative analyses of planktic and benthic foraminifera, nan-nofossil assemblages, integrated with oxygen and carbon isotope measurements, for the middle Eocene Scaglia limestones of the Contessa Highwa...
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2007
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ftsouthampton:oai:eprints.soton.ac.uk:45392 2023-07-30T04:07:03+02:00 The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy Jovane, L. Florindo, F. Coccioni, R. Dinares-Turell, J. Marsili, A. Monechi, S. Roberts, A.P. Sprovieri, M. 2007 https://eprints.soton.ac.uk/45392/ http://www.gsajournals.org/perlserv/?request=get-document&doi=10.1130%2FB25917.1 unknown Jovane, L., Florindo, F., Coccioni, R., Dinares-Turell, J., Marsili, A., Monechi, S., Roberts, A.P. and Sprovieri, M. (2007) The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy. Geological Society of America Bulletin, 119 (3), 413-427. (doi:10.1130/B25917.1 <http://dx.doi.org/10.1130/B25917.1>). Article PeerReviewed 2007 ftsouthampton https://doi.org/10.1130/B25917.1 2023-07-09T20:51:44Z We report a high-resolution paleomagnetic investigation constrained by new qualitative and semiquantitative analyses of planktic and benthic foraminifera, nan-nofossil 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 time scale 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, which 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 consequent global CO2-driven climate change. Article in Journal/Newspaper Southern Ocean University of Southampton: e-Prints Soton Southern Ocean Indian Geological Society of America Bulletin 119 3-4 413 427 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
We report a high-resolution paleomagnetic investigation constrained by new qualitative and semiquantitative analyses of planktic and benthic foraminifera, nan-nofossil 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 time scale 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, which 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 consequent global CO2-driven climate change. |
format |
Article in Journal/Newspaper |
author |
Jovane, L. Florindo, F. Coccioni, R. Dinares-Turell, J. Marsili, A. Monechi, S. Roberts, A.P. Sprovieri, M. |
spellingShingle |
Jovane, L. Florindo, F. Coccioni, R. Dinares-Turell, J. Marsili, A. Monechi, S. Roberts, A.P. Sprovieri, M. The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy |
author_facet |
Jovane, L. Florindo, F. Coccioni, R. Dinares-Turell, J. Marsili, A. Monechi, S. Roberts, A.P. Sprovieri, M. |
author_sort |
Jovane, L. |
title |
The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy |
title_short |
The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy |
title_full |
The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy |
title_fullStr |
The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy |
title_full_unstemmed |
The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy |
title_sort |
middle eocene climatic optimum event in the contessa highway section, umbrian apennines, italy |
publishDate |
2007 |
url |
https://eprints.soton.ac.uk/45392/ http://www.gsajournals.org/perlserv/?request=get-document&doi=10.1130%2FB25917.1 |
geographic |
Southern Ocean Indian |
geographic_facet |
Southern Ocean Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Jovane, L., Florindo, F., Coccioni, R., Dinares-Turell, J., Marsili, A., Monechi, S., Roberts, A.P. and Sprovieri, M. (2007) The middle Eocene climatic optimum event in the Contessa Highway section, Umbrian Apennines, Italy. Geological Society of America Bulletin, 119 (3), 413-427. (doi:10.1130/B25917.1 <http://dx.doi.org/10.1130/B25917.1>). |
op_doi |
https://doi.org/10.1130/B25917.1 |
container_title |
Geological Society of America Bulletin |
container_volume |
119 |
container_issue |
3-4 |
container_start_page |
413 |
op_container_end_page |
427 |
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1772820129000718336 |