Image: PawneeButtes 1900 USGS
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Description: Pawnee Buttes consists of Arikaree sandstone on Brule clay with a strong unconformity due to erosion; typical beds of concretions in Arikaree formation. Weld County, Colorado (Circa 1900).
Title: PawneeButtes 1900 USGS
Credit: U.S. Geological Survey Professional Paper 32 (1905)
Author: Darton, N. H. (USGS)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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