Colorado Mining Maps

San Juan Basin New Mexico Colorado - USGS 1959 - 29.41 x 23
Southwestern Wyoming Adjacent States - Bradley 1961 - 23 x 31.91
Sterling Quad Colorado Nebraska Kansas - Scott 1978 - 40.84 x 23
Fluorspar Deposits in Colorado - Brady 1975 - 28.90 x 23
Sterling Quad of Structure Oil Gas Fields - Scott 1978 - 31.49 x 23