Columbite-(Fe)-Columbite-(Mn) Series from selected localities.
USA | |
| Rocks & Min.:60:116; Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 32 (Table A-1).; Norton, James J. (1964) Pegmatites and other Precambrian Rocks in the Southern Black Hills; Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota. USGS Professional Paper 297E. |
R&M 75:3 pp 156-169; American Mineralogist, Volume 73, pages 324-337, 1988; U.S. Geological Survey Professional Paper 297 | |
William C. van Laer, bead tests for Fe, Mn; published 2008 | |
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" |