|
USA | |
| [var. Manganese Dendrites] |
| Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C. Page, Lincoln R., Stocking, Hobart E., Smith, Harriet B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. Professional Paper 300. US Geological Survey doi:10.3133/pp300 Staatz, M. H. Norton, J. J. |
| E.L. Clopton collection #173 |
| E. L. Clopton collection, numerous specimens |
| [var. Manganese Dendrites] E.L. Clopton collection #1074 |
- Tinton Pegmatite Mining District
| USGS Bull 380D |
| Dunn, P. J., Peacor, D. R., Sturman, D. B., Ramik, R. A., Roberts, W. L., Nelen, J. A. (1986) Johnwalkite, the manganese analog of olmsteadite, from South Dakota. Neues Jahrbuch für Mineralogie - Monatshefte, 1986. 115-120 Dunn, P. J. Peacor, D. R. Sturman, D. B. Ramik, R. A. Roberts, W. L. |
- Bear Lodge alkaline igneous complex
| Hutchinson, M., Slezak, P., Wendlandt, R., & Hitzman, M. (2022). Rare Earth Element Enrichment in the Weathering Profile of the Bull Hill Carbonatite at Bear Lodge, Wyoming, USA. Economic Geology, 117(4), 813-831. |
Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA