Search results for ‘David A Lindsey,William H Langer’

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      Cover image for Gravel Deposits of the South Platte River Valley North of Denver, Colorado
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      Gravel Deposits of the South Platte River Valley North of Denver, Colorado

      David A Lindsey,William H Langer

      The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the…

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