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Backcountry travel in Grand Canyon to collect groundwater samples

By Communications and Publishing February 2018 (approx.)
USGS scientists rafted about 150 miles on the Grand Canyon portion of the Colorado River to collect groundwater samples.
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Detailed Description

USGS scientist Nick Voichick rafted about 150 miles in nine days on the Grand Canyon portion of the Colorado River to collect groundwater samples from springs in remote locations. 

 

Sources/Usage

Public Domain.