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USGS news: August science picks
Date:8/18/2008

For the first time in Olympic history, the metals will incorporate a distinctive band of jade, representing honor and virtue in traditional Chinese culture. Gold, silver and copper from Australia and Chile were donated by BHP Billiton, the largest mining company in the world, to be combined with jade from the Qinghai Province of China to create medals for the winning athletes. For statistics and information on the worldwide supply of, demand for and flow of minerals and materials, including gold, silver, copper and jade, visit http://minerals.usgs.gov/minerals/pubs/commodity/. For more information, contact Jessica Robertson at 703-648-6624 or jrobertson@usgs.gov.

Spring Nutrient Delivery to the Gulf Estimated Among Highest in Three Decades

Spring nutrient delivery from the Mississippi-Atchafalaya River Basin to the northern Gulf of Mexico is estimated to be among the highest in the last three decades. Nutrient delivery, particularly during the months of April through June, has been identified as one of the primary factors controlling the size of the hypoxic zone that forms during the summer in the northern Gulf of Mexico. The Gulf hypoxic zone is an area where oxygen levels drop too low to support most life in bottom and near-bottom waters. The large nutrient contributions are primarily due to near record-breaking streamflows this spring from April through June in the Mississippi River Basin. Streamflows were about 50 percent higher this year compared to the long-term spring average flows since about 1980. Estimated nutrient contributions from October 2007 through June 2008 are available at http://toxics.usgs.gov/hypoxia/mississippi/oct_jun/index.html. For more information, contact Jennifer LaVista at 703-648-4432 or jlavista@usg
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Contact: Jessica Robertson
jrobertson@usgs.gov
703-648-6624
United States Geological Survey
Source:Eurekalert

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