Spatial Coverage
- Nevada City Region (Calif.)1
- Nevada County1
- Newton County (Mo.)1
- Ogden (Utah)1
- Oregon1
- Ouray County (Colo.)1
- Pershing County1
- Pershing County (Nev.)1
- Pershing County.1
- Provo (Utah)1
- Red Mountain (Colo.)1
- Rochester Region1
- Rochester Region (Nev.)1
- Salt Lake City (Utah)1
- San Juan Region (Colo.)1
- San Miguel County (Colo.)1
- Similkameen River (B.C. and Wash.)1
- Southern California.1
- Spring Mountains Region (Nev.)1
- Tonopah Mining District (Nev.)1
