Skip to Main Content
Book Chapter

The late Eocene greenhouse-icehouse transition: Observations from the Massignano global stratotype section and point (GSSP)

By
Luigi Jovane
Luigi Jovane
Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy, and Geology Department, Western Washington University, 516 High Street, Bellingham, Washington 98225, USA
Search for other works by this author on:
Rodolfo Coccioni
Rodolfo Coccioni
Dipartimento di Scienze dell’Uomo, dell’Ambiente e della Natura, Università degli Studi di Urbino “Carlo Bo,” Campus Scientifico, Località Crocicchia, 61029 Urbino, Italy
Search for other works by this author on:
Andrea Marsili
Andrea Marsili
Dipartimento di Scienze dell’Uomo, dell’Ambiente e della Natura, Università degli Studi di Urbino “Carlo Bo,” Campus Scientifico, Località Crocicchia, 61029 Urbino, Italy
Search for other works by this author on:
Gary Acton
Gary Acton
Department of Geology, University of California–Davis, One Shields Avenue, Davis, California 95616, USA
Search for other works by this author on:
Published:
April 01, 2009

The interval from the middle Eocene to early Oligocene represents one of the most significant transitions in Earth’s climate, during which greenhouse conditions were supplanted by icehouse conditions of the present day. This global transition was preceded by a long-term cooling phase and short-term uncorrelated variations in several marine proxies, which indicate paleoceanographic instabilities prior to the key climatic transition. We integrate previous multidisciplinary studies with recent data from the Massignano section (Umbria-Marche Basin) and summarize interpretations of studies from the past 20 yr that have been based on the Eocene-Oligocene boundary global stratotype section and point (GSSP). Based on the many data sets from this section, with an emphasis on the rock magnetic data, we propose that the fluctuations and final cessation of a westward subtropical Eocene Neotethys (STENT) current were drivers in the climatic transition from greenhouse to icehouse conditions. Our hypothesis considers that the global variable climatic conditions were synchronous to large changes in circulation in the western Neotethys Ocean, which were primarily due to paleogeographic and sea-level changes. Specifically, the closing of the gateway between the Arabian and Eurasian plates, through coupling of sea-level changes, could represent the threshold or one of the triggers that caused the paleoceanographic variations in the Neotethys and in global ocean circulation patterns during the end of the Eocene.

You do not currently have access to this article.

Figures & Tables

Contents

GSA Special Papers

The Late Eocene Earth—Hothouse, Icehouse, and Impacts

Christian Koeberl
Christian Koeberl
Search for other works by this author on:
Alessandro Montanari
Alessandro Montanari
Search for other works by this author on:
Geological Society of America
Volume
452
ISBN print:
9780813724522
Publication date:
April 01, 2009

References

Related

Citing Books via

A comprehensive resource of eBooks for researchers in the Earth Sciences

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal