The Colorado Geological Survey has released a CD-ROM titled Digital Inventory of Industrial Mineral Mines and Mine Permit Locations in Colorado. The disc lists industrial minerals, such as sand, gravel, crushed stone, limestone, clay gypsum, nahcolite, and fluorspar.
The CD-ROM consists of geographic information system (GIS) files containing location and commodity information for industrial mineral deposits in Colorado. Also, digital maps show where the mines are situated.
Listed are all industrial mineral mines active in 2001, together with permit-related data.
The CD-ROM costs US$15 plus shipping.
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