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[Maps of Metal-Mining Districts in Colorado]

Description: Three maps illustrating distribution of metal deposits in metal-mining districts in Colorado. The first map is a geological survey indicating uranium deposits, rock characteristics, and the location of the Central Mining District in relationship to counties in Colorado. The second map shows pitchblende deposits and bostonite dikes in the Front Range Mineral Belt near Central City, Colorado. The third map near indicates the locations of pitchblende deposits alongside metal vein systems near Cent… more
Date: June 1952
Creator: Geological Survey (U.S.)

[Figures 1-7: Trace Elements Program Maps]

Description: Maps of Trace Elements Programs field projects, including locations of drill holes for the Colorado Plateau project and location of eastern oil shale in Tennessee.
Date: 1948-06~
Creator: Geological Survey (U.S.). Trace Elements Office.
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