Tuff from San Juan Mountains, USA
USA | |
| Sanford, R.F., Kramer, A.M., O'Brien, Hugh (1986) Geology, mineralogy and paragenesis of the Pride of America Mine, Lake City, Hinsdale County, Colorado. Open-File Report Vol. 1986 (86-629) US Geological Survey doi:10.3133/ofr86629 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |