Manganese-bearing Calcite from San Juan Mountains, USA
USA | |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Mineralogical Record:16(3):203-216 |
| Rocks & Min 70:5 pp 298-310 |
| Holmes, Richard Walker, Kennedy, Marrianna B. (1983) Mines and Minerals of the Great American Rift (Colorado-New Mexico). Van Nostrand Reinhold Co., New York. |
U.S. Geological Survey Professional Paper 1753 | |
U.S. Geological Survey Professional Paper 1753 | |
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. | |
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Telluride, Ophir Mining District, San Miguel County, Colorado, USA