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September Geology and GSA Today media highlights
Date:8/28/2007

Boulder, CO, USA - Topics include: discovery of Sudbury impact event debris in Michigan; climate change and dispersal of early modern humans out of Africa; relationship of mantle plumes and supercontinent cycles; relationship of San Andreas fault system activity and the eastern California shear zone; and ramifications of sediment mixing in studying the Great Barrier Reef. An open-access Research Focus on paleoseismology addresses earthquake prediction. The GSA TODAY science article examines climate change, Ethiopian Plateau development, and human evolution.

Highlights are provided below. Representatives of the media may obtain complimentary copies of articles by contacting Ann Cairns at acairns@geosociety.org. Please discuss articles of interest with the authors before publishing stories on their work, and please make reference to GEOLOGY in articles published. Contact Ann Cairns for additional information or other assistance.

Non-media requests for articles may be directed to GSA Sales and Service, gsaservice@geosociety.org.


Late Paleozoic tropical climate response to Gondwanan deglaciation
Christopher J. Poulsen, University of Michigan, Department of Geological Sciences, Ann Arbor, MI 48109, USA; et al. Pages 771-774.

The Late Paleozoic ice age, one of the most severe glaciations in Earth history, came to an end in the Permian. Poulsen et al. use numerical climate-biome models to demonstrate that the deglaciation of high-latitude Gondwana likely had an enormous impact on tropical climate and environments. Climate model results indicate that the deglaciation of Gondwana may have led to warming, aridification, and desertification of equatorial Pangea. These model results are consistent with Late Paleozoic proxies of climate change, and imply a tight linkage between high- and low-latitude climate change.



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Contact: Ann Cairns
acairns@geosociety.org
303-357-1056
Geological Society of America
Source:Eurekalert

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