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December 2008 Geology and GSA Today media highlights
Date:11/26/2008

Boulder, CO, USA - GEOLOGY articles cover the minute to the grand, from calcite-producing earthworms, skeletal metazoans, and mineral discoveries, to Earth's highest coastal mountain range, a newly discovered extension of the Nile deep-sea fan, and a Canadian impact crater, and mark important events in time, from a 9-degree warming in Greenland only 14,700 years ago to Africa's Middle Stone Age. GSA TODAY goes farther back in time to analyze the formation and closure of the Rheic Ocean.

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

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

Rapid exhumation of ice-covered rocks of the Chugach-St. Elias orogen, Southeast Alaska

Eva Enkelmann et al., Earth and Environmental Science Department, Lehigh University, 31 Williams Drive, Bethlehem, Pennsylvania 18015, USA. Pages 915-918.

The Chugach-St. Elias orogen in Southeast Alaska is the Earth's highest coastal mountain range, with peaks exceeding 5500 meters. Due to the high elevation, high latitude, and proximity to the Pacific Ocean, the mountain rage is mostly covered by ice. The thick ice cover hinders rock sampling at low-elevation areas, which are generally used for the study of the exhumation processes in mountain ranges. Enkelmann et al. studied the cooling ages of detrital zircons from glacial rivers to get information about the erosion processes underneath the ice. They present a new exhumation model for the Chugach-St. Elias orogen that st
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Contact: Christa Stratton
cstratton@geosociety.org
303-357-1093
Geological Society of America
Source:Eurekalert

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