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National Mine, Rockland, Ontonagon Co., Michigan, USA
An underground copper mine consisting of seven shafts located just south of Rockland, MI. The National Mine was chartered in 1848 and worked until 1871. The mine was worked on tribute until 1893, when the mine was closed for good. The National Mine produced approx. 11.6 million lbs. of refined copper. The mine piles today produce quality copper and silver crystals, copper chisel chips, and malachite.
Mineral List
| Azurite Baryte Calcite 'Chlorite Group' | Chrysocolla Copper Cuprite Dolomite | Epidote 'K Feldspar' Malachite Natrolite | Pumpellyite-(Mg) Quartz var: Chalcedony Silver |
16 entries listed. 13 valid minerals.
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References
Rocks & Min.: 58: 112
Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.
The Copper Country Rock & Mineral Club, 2001, Red Gold and Tarnished Silver, 2nd Ed., 44 pp.
Clarke, D.H., 1978, Copper Mines of keweenaw: Minesota Mining Company, No. 11, 28 pp.
Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.
The Copper Country Rock & Mineral Club, 2001, Red Gold and Tarnished Silver, 2nd Ed., 44 pp.
Clarke, D.H., 1978, Copper Mines of keweenaw: Minesota Mining Company, No. 11, 28 pp.
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Locality Updated: VC Quarry, Isle of Lundy, North Devon, Devon, England, UKFrom David Ifold, 20th Jun 2013 10:51:41