Page, Lincoln R., Stocking, Hobart E., Smith, Harriet B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. Professional Paper 300. US Geological Survey doi:10.3133/pp300

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	*Dodge, F.C., Loyd, R.C. (1984) Gold deposits of the western Sierra Nevada; field trip guide. Open-File Report* Vol. 1984 (84-169) US Geological Survey doi:10.3133/ofr84169**	Report (issue)
	California's past gold production. Although gold mining decreased greatly in the years during and following...extractive techniques have rekindled interest in mining this metal in the State. In addition to production...been taken from the Grass Valley-Nevada City lode district and from Tertiary river channels and Quaternary...containing appreciable arsenopyrite, chalcopyrite, galena, and sphalerite as well as pyrite. West Belt deposits...systems of the Grass Valley-Nevada City district, Nevada County, are about 30 miles north of the Mother
	Schmid, Susanne, Taylor, Wayne R., Jordan, Daniel P. (2020) The Bigrlyi Tabular Sandstone-Hosted Uranium–Vanadium Deposit, Ngalia Basin, Central Australia. Minerals, 10 (10) 896 doi:10.3390/min10100896	Journal (article/letter/editorial)
	deposits which are well known from the Colorado Plateau, USA. Most mineralization at Bigrlyi occurs as...purple–red sandstone succession. A larger halo of lower grade vanadium mineralization extends beyond the...Basin and Uravan Mineral Belt districts of the Colorado Plateau. In these deposits it is believed that...[6]. The distribution of U-V ore bodies of the Colorado Plateau is described as being mostly controlled...(oxidized) U-V ores are recognized amongst the Colorado Plateau deposits. The U-V mineralogy of unoxidized

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Galena from Placerville Mining District, Lower San Miguel Mining District, San Miguel County, Colorado, USA

Galena from
Placerville Mining District, Lower San Miguel Mining District, San Miguel County, Colorado, USA