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2. Besser JM, Finger SE, Church SE (2007) Impacts of historical mining on aquatic systems-An ecological risk assessment, chapter D. In: Church SE, von Guerard P, Finger SE (eds) Integrated investigations of environmental effects of historical mining in the Animas River watershed, San Juan County, Colorado. U.S. Geological Survey Professional Paper 1651, pp 87–106
3. Bove DJ, Hon K, Budding KE, Slack JF, Snee LW, Yeoman RA (2001) Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan Mountains, Colorado. U.S. Geological Survey Professional Paper 1642
4. Bove DJ, Yager DB, Mast MA, Dalton JB (2007a) Alteration map showing major faults and veins and associated water-quality signatures of the Animas River watershed headwaters near Silverton, southwest Colorado. U.S. Geological Survey Scientific Investigations Map 2976, 18-p pamphlet, 1 plate, scale 1:24,000
5. Bove DJ, Mast MA, Dalton JB, Wright WG, Yager DB (2007b) Major styles of mineralization and hydrothermal alteration and related solid and aqueous-phase geochemical signatures, chapter E3. In: Church SE, von Guerard, P, Finger SE (eds) Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado. U.S. Geological Survey Professional Paper 1651, pp 161–230