Specimen Number40-7-035Alternate Number67-1-8CommentsSiderite + magnetite + chert-bearing BIF. C unit of Negaunee Formation. May be crocidolite-bearing.In Teaching CollectionNoMineral(s)sideritemagnetitechertcrocidoliteRock NameFe oreDistrictMarquette RangeMineEmpire, MIExternal LinkMindatDeposit TypeBIFGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
40-7-035: Fe ore - Michigan District - Empire, MI Mine. Franklin College Collections, accessed 13/11/2026, https://digitalcollections.franklin.uga.edu/nodes/view/57847