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Date: 2002-03-08 10:25:12Volcanic rocks Colorado Plateau Basin and Range Province Fish Canyon tuff Volcanology Extinct volcanoes San Juan Mountains Animas River Silverton Colorado Geography of Colorado Colorado counties Igneous petrology | U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAPAdd to Reading ListSource URL: pubs.usgs.govDownload Document from Source WebsiteFile Size: 48,74 KBShare Document on Facebook |