The hills in the distance consist of gently dipping sedimentary rocks. The gentle slopes of the hilltops are the tops of resistant sedimentary rock layers. Hills with a gently sloping top like this are called cuestas, from the Spanish word for "slope."
Location: 41o 58' 15" N, 107o 20' 30" W.
Created 25 November 2005, Last Update 14 December 2009
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