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Bedrock contours underlying the alluvium of the Lower Arkansas River Valley, Southeast Colorado

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2020-08-14T00:00:00Z
Contours (20-foot interval) showing altitude of the bedrock surface in feet above NGVD 29 underlying the alluvium in the Lower Arkansas River Valley, Southeast Colorado. Source contours scale was 1:62,500. All digitizing and geoprocessing was done using ArcGIS Desktop v10 (Environmental Systems Research Institute, 2011)

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