Specimen Number28-10-059Alternate NumberA-522Commentsfrom Bob Carpenter research collectionIn Teaching CollectionNoMineral(s)algodoniteRock Namepolished plugsDistrictKeweenawDeposit TypeKeweenaw CopperReference MaterialACL-143: White, W.S., 1966, Tectonics of the Keeweenaw Basin, Western Lake Superior Region; U.S. Geol. Surv. Prof. Paper 524-E, Washington, D.C., 22 p.
28-10-059: polished plugs - Keeweenaw District - Undefined Mine. Franklin College Collections, accessed 11/06/2026, https://digitalcollections.franklin.uga.edu/nodes/view/36388