USGS Minerals Information: Map Data Mineral Resources Program
Mine and Mineral Processing Plant Locations Maps, Commodity Grouping . With the exception of certain commodities, such as gold, silver, gemstones, and coal, . States in 1997, other than crushed stone, sand and gravel, and common clay.
Mining and quarrying Code_Lists
242, Mining of non ferrous metal ores, except gold and uranium . Other stone quarrying, including stone crushing and clay and sandpits, 2519, 25190 . dressing and beneficiating of minerals occurring naturally, for example solids such as.Live Chat