Picacho View
Arizona
Unconfirmed Niobium (Columbium)
Documented adit evidence
Niobium (Columbium) underground mines
Catalog records where USGS source data lists Niobium (Columbium) among mined commodities. Reported minerals on a mine page are tracked separately and are not the same as commodities.
- Underground mine records
- 6
- Independently verified
- 0
By state
- Arizona · 1
Top counties by record count
- Yavapai County, Arizona · 1
Representative records
Dungan Tungsten
Arizona
Unconfirmed Tungsten
Golden Gate Mining Co
Nevada
Unconfirmed Copper
New Cornelia Ajo
Arizona
Unconfirmed Copper
Historical mapped workings available
Outpost Mine
Arizona
Unconfirmed Bismuth
Documented adit evidence
Picacho View Mine
Arizona
Unconfirmed Feldspar
Historical mapped workings available