Specimen Number9-8-018Alternate NumberStop #4CommentsFrom Bob Carpenter research collection. Potassically altered unit in bottom of Berkely Pit.In Teaching CollectionNoMineral(s)feldsparpyritequartzsericiteRock Namealtered quartz monzoniteDistrictButteMineBerkeley pitExternal LinkMindatDeposit TypePorphyry CopperGeo-Coords[1] Reference MaterialACL-125: Miller, R.N., ed., 1973, Guidebook for the Butte Field Meeting of Society of Economic Geologists, Butte, Montana, August 18-21, 1973.