BOULDER, Colo. - The Geological Society of America's January issue of GEOLOGY contains a number of newsworthy items. Januarys highlights include a slushball tossed into the Snowball Earth controversy with Daniel Condons evidence of unfrozen sea areas during the Neoproteroizoic glaciations. Robert Speijer and Abdel-Mohsen Morsi provide data from Egypt that indicates significant polar ice caps existed during what had been thought to be a global greenhouse period 55 million years ago. Alan Arbogast looks at dune field formation during the Holocene in Michigan and the connection with climate and lake levels. Roger Larson brings to the fore mapping data for a 2000-mile geological structure--the Tongareva triple junction--in the southwestern Pacific basin. In the January issue of GSA TODAY, A. Hope Jahren and Leonel Silveira Lobo Sternberg use concepts of changing global weather patterns to explain puzzling evidence from Earths tropical period during the Eocene. (Jahren is the 2001 recipient of GSAs Young Scientist Award, the Donath Medal.)

Highlights from GEOLOGY and a summary of the science article for the January GSA TODAY are provided below. Please discuss articles of interest with the authors before publishing stories on their work, and please make reference to GEOLOGY or GSA TODAY in stories published. Contact Ann Cairns at acairns@geosociety.org for copies of articles and for additional information or other assistance.

Neoproterozoic glacial-rainout intervals: Observations and implications.

Daniel J. Condon et al. School of Geography and Geosciences, University of St.Andrews, St. Andrews, Fife KYI6 9AL, Scotland, UK. Pages 3538.

The exact nature and severity of the glacial epochs that characterized the mid-to-late Neoproterozoic is the subject of debate. Some workers suggest that repeated cycles of snowball Earth existed for millions of years, while others favor the int
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Contact: Ann Cairns
acairns@geosociety.org
303-357-1056
Geological Society of America
4-Jan-2002

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