Description: This shapefile serves as the extent for Water Chemistry
Service Item Id: 72fdd09ee7f34f9b9c3fd37cdc824d74
Copyright Text: Busby, J., Plummer, L., and Hansshaw, B., 1991, Geochemical evolution in the Madison in parts of Montana, North Dakota, South Dakota and Wyoming: U.S. Geological Survey Professional Paper 1272-f, 89 p.