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USGS scientist collects noble gas sample from spring site

By Communications and Publishing September 2013 (approx.)
Photo of USGS scientist collecting noble gas sample from spring site near Roaring Judy, Colorado. 
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Detailed Description

USGS scientist collects noble gas sample from spring site near Roaring Judy, Colorado. Groundwater discharge that flows into the Upper Colorado River Basin varies in response to drought, which is likely due to aquifer systems that contain relatively young groundwater, according to a new U.S. Geological Survey study. 

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Public Domain.