Specimen NumberTC-2-4-011Alternate NumberDEC-UP-1CommentsKeeweenaw basalt with zeolite-filled forked amygdule.In Teaching CollectionYesMineral(s)hematiteRock Nameamygdaloidal basaltDistrictKeweenawMineregional sampleDeposit 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.