Pyrolusite from selected localities.
USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 342; Jones, E.L., Jr. & F.L. Ransome (1920), Deposits of manganese ore in Arizona, USGS Bull. 710-D: 183; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 31; Wilson, E.D. & G.M. Butler (1930), Manganese ore deposits of AZ, AZ Bur. Mines Bull. 127: 101-102. |
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 31. | |
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 168 (Table 4); Farnham & Stewart (1958): 76. |