Specimen Number22-5-005Alternate NumberMass-2CommentsSimilar to Mass-1, abundant quartz + epidote.In Teaching CollectionNoMineral(s)epidotequartzRock NamesandstoneDistrictKeweenawMineMassExternal LinkMindatDeposit TypeKeweenaw CopperGeo-Coords[1] Reference 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.
22-5-005: sandstone - Michigan District - Mass Mine. Franklin College Collections, accessed 18/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/37952