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Eocene-Oligocene paleoceanographic changes in the stratotype section, Massignano, Italy: Clues from rock magnetism
 

Summary: Eocene-Oligocene paleoceanographic changes in the stratotype
section, Massignano, Italy: Clues from rock magnetism
and stable isotopes
Luigi Jovane,1
Mario Sprovieri,2
Fabio Florindo,1
Gary Acton,3
Rodolfo Coccioni,4
Barbara Dall'Antonia,5
and Jaume Dinare`s-Turell1
Received 30 January 2007; revised 15 July 2007; accepted 16 August 2007; published 10 November 2007.
[1] We have conducted high-resolution paleomagnetic and rock magnetic studies, in
addition to stable isotope analyses of the Massignano sedimentary section, which is the
Global Stratotype Section and Point (GSSP) for the Eocene-Oligocene boundary. Our
research builds upon the many past studies of the Massignano section in seeking to
understand the timing and nature of the paleoenvironmental variations that occurred
during the transition for the Earth's climate system from greenhouse to icehouse. The new
paleomagnetic results provide a refined magnetostratigraphy of the section and new age for
the Eocene-Oligocene boundary at 33.7 Ma. Abrupt and large alternations in magnetic,
concentration, composition, and grain sizes that occur in the high-resolution rock magnetic

  

Source: Acton, Gary - Department of Geology, University of California, Davis

 

Collections: Geosciences