Manganite from Cuyuna North Range, Crow Wing County, Minnesota, USA
USA | |
| Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4, |
| Potter, Russell M., Rossman, George R (1979) The tetravalent manganese oxides: identification, hydration, and structural relationships by infrared spectroscopy. American Mineralogist, 64 (11-12) 1199-1218 |
R&M 48:6 p 420 |
Robert Mine, Cuyuna North Range, Crow Wing County, Minnesota, USA