USGS Multimedia Gallery
Title: Stratigraphic Studies
Description: Stratigraphic studies of Quaternary alluvium provides resource data to the U.S. aggregate industry.
Location: Phoenix, AZ, USA
Date Taken: Jan 1 2010
Photographer: Bill Langer , USGS
Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.
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