Mason, J. A., Joeckel, R. M. 2002. Surficial Geology of the Platte River Valley, Fremont to Ashland (Fremont East, Arlington, Valley, Wann, and Ashland East 7.5-Minute Quadrangles), Version 1, CD. Description: This CD contains digital surficial geologic and stack maps of the USGS Fremont East, Arlington, Valley, Wann and Ashland East 7.5-minute quadrangles, and an accompanying report explaining the maps and providing additional information on the surficial geology of two quadrangles. Out of print, unbound copy available.