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USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS Prof Paper 649 |
- 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. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- State Line Kimberlite Mining District
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| (n.d.) |
| Martins, T., Chakhmouradian, A.R., and Medici, L. (2014) Perovskite alteration in kimberlites and carbonatites: the role of kassite, CaTi2O4(OH)2. Physics and Chemistry of Minerals, 41, 473–484. Coopersmith, H. G., Mitchell, R. H., & Hausel, W. D. (2003, June). Kimberlites and lamproites of Colorado and Wyoming, USA. In Guidebook for the VIIIth International Kimberlite Conference, Colorado and Wyoming Field Trip (Vol. 32). |
White Earth Mining District, Gunnison County, Colorado, USA