TY - Generic T1 - Active mines and mineral plants in the US Y1 - KW - #MapsDataPublications KW - #MineralResources KW - active KW - collecting KW - dimension stone KW - economic geology KW - gold KW - lead KW - minerals KW - mines KW - quarries KW - sand and gravel KW - sand pits KW - silver AB - Mine plants and operations for commodities monitored by the National Minerals Information Center of the USGS. Operations included are those considered active in 2003 and surveyed by the USGS. PB - USGS UR - http://tin.er.usgs.gov/mineplant/ ER -