Specimen Number35-8-021Alternate Number10618CommentsMedium-grained equigranular granite.In Teaching CollectionNoMineral(s)quartzk-sparbiotiteamphiboleRock NamegraniteDistrictButteDeposit TypePorphyry CopperThin SectionBox 7, slots 88-89Donated 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.
35-8-021: granite - Butte District - Unknown Mine. Franklin College Collections, accessed 17/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/54728