- White Earth Mining District (Powderhorn Mining District)
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. Armbrustmacher, T.J. (1981) The complex of alkaline rocks at Iron Hill, Powederhorn district, Gunnison County, Colorado. in 32nd Field Conference New Mexico Geological Society: 293-296. |
Vestegard Pegmatite, La Jarita-Apache area, Petaca Mining District, Rio Arriba County, New Mexico, USA