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Carroll Co., Maryland, USA
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Carrol County bedrock is primarily complex early Cambrian to Late Precambrian igneous and metamorphic rocks of the Piedmont Province. Metamorphism has converted these metasedimentary and metavolcanic rocks to schists, gneiss, marble and quartzite. Meta-gabbros and metamorphosed ultramafic rocks have been converted to talc and amphibole-chlorite schists. These rocks are hosts of the iron, copper and cobalt deposits of the Sykesville Mining District, which were worked from the mid 1700's until early 1900's. The County is the type locality for carrollite, a copper-cobalt-nickel sulfide.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Actinolite
'Albite-Anorthite Series'
Arfvedsonite
Augite
Azurite
'Biotite'
Bornite
Brochantite
'Calamine'
Calcite
var: Manganoan Calcite
Carrollite (TL)
Chalcanthite
Chalcocite
Chalcopyrite
'Chlorite Group'
Chromite
Chrysocolla
'Clay'
Copper
Covellite
Dolomite
Epidote
Gahnite
Galena
'Garnet'
Goethite
Gold
Hematite
var: Specularite
'Hornblende'
Hydrozincite
Idaite
Ilmenite
'Limonite'
Linnaeite
Magnetite
Malachite
Melanterite
Molybdenite
Muscovite
var: Sericite
Pseudomalachite
Pyrite
Quartz
'Remingtonite' (TL)
Riebeckite
'Serpentine Group'
Siderite
Siegenite
Smithsonite
Sphalerite
Spinel
Talc
Tenorite
Todorokite
Tremolite
Violarite
Wulfenite
Zoisite


67 entries listed. 47 valid minerals. 1 type locality (valid mineral). 1 type locality (other).

Localities in this Region

USA
USA

The above list 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

Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.

Stose, A. J. et. al. (1946) Carroll and Frederick Counties: Maryland Geological Survey: County Reports: 312 p.

Pearre, Nancy (1961) Mineral deposits of Maryland excluding fuel, sand and gravel: U.S. Geological Survey Mineral Investigations Resources Map MR-12.

Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p.

Bernstein, Lawrence (1980) Minerals of the Washington D. C. area: Maryland Geological Survey Educational Series 5, 148 p.

Kuff, K. (1981) Mineral resources map of the New Windsor Quadrangle, Maryland: Mineral Resources Quadrangle Map #1: 1:24,000.

Kuff, K. (1981) Mineral resources map of the Union Bridge Quadrangle, Maryland: Mineral Resources Quadrangle Map #2: 1:24,000.

Kuff, K. (1981) Mineral resources map of the Finksburg and Sykesville Quadrangles, Maryland: Mineral Resources Quadrangle Map #3: 1:24,000.

Muller, P. D. (1994) Finksburg Geological Quadrangle Map 1:24,000: Maryland Geological Survey

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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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