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

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Latitude & Longitude (WGS84): 39° 22' 39'' North , 76° 39' 54'' West
Latitude & Longitude (decimal): 39.37755,-76.66498
Köppen climate type:Cfa : Humid subtropical climate


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.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


30 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleozoic - Proterozoic
252.17 - 2500 Ma



ID: 2720256
Baltimore Gabbro Complex

Age: to Permian (252.17 - 2500 Ma)

Stratigraphic Name: Baltimore Gabbro Complex

Description: Hypersthene gabbro with subordinate amounts of olivine gabbro, norite, anorthositic gabbro, and pyroxenite; igneous minerals and textures well preserved in some rocks, other rocks exhibit varying degrees of alteration and recrystallization with a new metamorphic mineral assemblage.

Lithology: Major:{gabbro}, Minor:{norite,pyroxenite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.

Mineral and/or Locality  
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