Industrial Minerals in Colorado
June 20, 2012 | United States Geologcial Survey
The United States Geological Survey has published, Circular 1368, Development of Industrial Minerals in Colorado. This publication provides information on clay and shale, sand and gravel, silica sand, crushed stone, limestone, gypsum, lightweight aggregates, dimension stone, feldspar and mica, sulfur, barite, gemstones, fluorspar, nahcolite, titanium and zeolite.  |
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