Astronomic calibration of the late Eocene/early Oligocene Massignano section (central Italy)
Astronomic calibration of the late Eocene/early Oligocene Massignano section (central Italy)
We present an astronomically tuned polarity timescale for the late Eocene/early Oligocene based on a cyclic limestone/marls sedimentary succession exposed at Massignano, Italy (GSSP for the Eocene-Oligocene boundary). Here we applied spectral analysis techniques to the high-resolution magnetic susceptibility record. The results provide clear evidence of a regular and cyclic signal that allows us to discard a stochastic mechanism as controlling these fluctuations. Conversely, these outcomes reveal the presence of stable and notable periodicities that are in tune with those associated with orbital forcing. Through a cyclostratigraphic analysis of the rhythmic sedimentary alternations and combination with the results of time series analysis of the proxy record, we refine the late Eocene portion of the GPTS. Through astronomical tuning of the rhythmic sedimentary alternations to recent astronomically calculated variations of Earth's orbit we recalibrated the polarity boundaries ages and the main stratigraphic events recognized throughout the sedimentary record. Among these, an age of 33.714 Ma is proposed for the E/O boundary.
Q07012
Jovane, Luigi
7e165ffb-8e06-4ac1-9c47-d3edf3e0ddd8
Florindo, Fabio
5953170b-79f7-431e-9e08-824a47e0fbd5
Sprovieri, Mario
28ef1327-5ab6-4567-8129-981a7195da89
Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
27 July 2006
Jovane, Luigi
7e165ffb-8e06-4ac1-9c47-d3edf3e0ddd8
Florindo, Fabio
5953170b-79f7-431e-9e08-824a47e0fbd5
Sprovieri, Mario
28ef1327-5ab6-4567-8129-981a7195da89
Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Jovane, Luigi, Florindo, Fabio, Sprovieri, Mario and Pälike, Heiko
(2006)
Astronomic calibration of the late Eocene/early Oligocene Massignano section (central Italy).
Geochemistry, Geophysics, Geosystems, 7 (7), .
(doi:10.1029/2005GC001195).
Abstract
We present an astronomically tuned polarity timescale for the late Eocene/early Oligocene based on a cyclic limestone/marls sedimentary succession exposed at Massignano, Italy (GSSP for the Eocene-Oligocene boundary). Here we applied spectral analysis techniques to the high-resolution magnetic susceptibility record. The results provide clear evidence of a regular and cyclic signal that allows us to discard a stochastic mechanism as controlling these fluctuations. Conversely, these outcomes reveal the presence of stable and notable periodicities that are in tune with those associated with orbital forcing. Through a cyclostratigraphic analysis of the rhythmic sedimentary alternations and combination with the results of time series analysis of the proxy record, we refine the late Eocene portion of the GPTS. Through astronomical tuning of the rhythmic sedimentary alternations to recent astronomically calculated variations of Earth's orbit we recalibrated the polarity boundaries ages and the main stratigraphic events recognized throughout the sedimentary record. Among these, an age of 33.714 Ma is proposed for the E/O boundary.
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Submitted date: 22 November 2005
Published date: 27 July 2006
Identifiers
Local EPrints ID: 41259
URI: http://eprints.soton.ac.uk/id/eprint/41259
ISSN: 1525-2027
PURE UUID: 55d01a09-e419-4fcd-b675-f2ddc04f1ef7
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Date deposited: 11 Aug 2006
Last modified: 15 Mar 2024 08:26
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Contributors
Author:
Luigi Jovane
Author:
Fabio Florindo
Author:
Mario Sprovieri
Author:
Heiko Pälike
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