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Bare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore Co., Maryland, USA

Bronzite
Bare Hills Copper Mine, Bare Hills, Baltimore Co., Maryland, USA

Photo: Rob Lavinsky
A copper mine located about 1 mile NW of Mt Washington and about 3 miles NW of Baltimore. Started 1845 and closed 1880. Reopened during the period 1905. Owned by the Bare Hills Mining Co. Host rock is hornblende gneiss. Produced 32,500 tons of 18% Cu. Workings featured a 600 foot shaft, later deepened to 900 feet.

Mineral List

Actinolite
Albite
Almandine
Anthophyllite
Aragonite
Azurite
Bornite
Calcite
Carrollite
Chalcanthite
Chalcocite
Chalcopyrite
'Chlorite Group'
Chrysocolla
Covellite
Cummingtonite
Cuprite
var: Chalcotrichite
Enstatite
Epidote
Ferro-hornblende
Gypsum
var: Selenite

Laumontite
Magnetite
Malachite
Melanterite
Microcline
Pyrite
Quartz
Schorl
'Stilbite'
Talc
Tremolite


33 entries listed. 29 valid minerals.

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References

Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Maryland Geological Survey, 92 p.

Zodac, Peter (1946) Bare Hills Copper Mine: Rocks and Minerals: 21(3): 144-145.

Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28: 60-63.

Moore, H.C. (1994) A brief history of the copper mine at Bare Hills, Maryland: Matrix: 3 (4&5): 93-97.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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