Description
Prehistoric copper culture Native Americans
Commodities
PrimaryCopper
Commodity typeM
Deposit
Model96: Native Cu
Deposit sizeS
Orebody formFISSURE
Geology
Host rockRhyolite · Portage Lake Volcanics
StructureFissure in brecciated rhyolite overlying Minong basalt flow
Economic & production
Development statusPast Producer
First production1875
Last production1883
Discovery year1871
Identification
Deposit ID10082641
MRDS IDW060079
RegionNA
Data scoreB
Coordinates48.08389, -88.7245
References
Lane, A.C., 1898, Upper Peninsula, Isle Royale: Geological Survey of Michigan, v. 6, part 1, 28 p.Huber, N.K., 1973, Geological map of Isle Royale National Park, Keweenaw County, Michigan: U.S. Geological Survey Miscellaneous Geological Investigations Map I-796, scale 1:62500.LANE, 1898