Specimen Number35-7-003Alternate Number10541CommentsFresh granite.In Teaching CollectionNoMineral(s)quartzk-sparbiotiteamphibolepyriteField NotesNo mine specified, so can only say for sure that samples are from "Butte".Rock NamegraniteDistrictButteExternal LinkMindatGeo-Location30' east of 1005 and 1006.Deposit TypePorphyry CopperDonated ByUniversity of Wisconsin-Madison Department of GeoscienceReference MaterialACL-125: Miller, R.N., ed., 1973, Guidebook for the Butte Field Meeting of Society of Economic Geologists, Butte, Montana, August 18-21, 1973.
35-7-003: granite - Butte District - Unknown Mine. Franklin College Collections, accessed 13/11/2026, https://digitalcollections.franklin.uga.edu/nodes/view/54629