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Valley of Animas River Valley, Durango quadrangle, La Plata County, Colorado. 1897. Album Caption: Looking down and across the Animas Valley from mountain above Animas City. Shows moraine, gravel terraces and the scarp of the Fox Hill coal measures. Durango quadrangle, La Plata County, Colorado. 1897. Photo by A.C. Spencer. Published in U.S. Geological Survey Professional paper 166, Plate 25-A. 1932. Categories: Image; Tags: Cross, C.W. Collection, Photographers, photo print