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Goethite  | | | | Reference: | [USGS Prof Paper 407] |
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Groutite (TL)  | | | | Type Locality: | Sagamore Mangan No. 2 pit, Ironton, Cuyuna North Range, Crow Wing Co., Minnesota, USA | | Reference: | [Amer.Min.(1945) 30, 169] |
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Magnetite  | | | | Reference: | [USGS Prof Paper 407] |
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Pyrite  | | | | Reference: | [USGS Prof Paper 407] |
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