Mine detail: Maryland Mine

Previously called 'Great Falls Mine?'

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Location

Lat / long:

38.99559, -77.23162

Resource(M)

Primary:	Gold
Ore:	Chalcopyrite, Galena, Pyrite, Pyrrhotite
Orebody form:	LINEAR
Discovery year:	1860

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Past Producer
First production started:	1868

Geology

Host rock:	Mica Schist, Wissahickon Formation
Host type:	Mica Schist
Structure:	Reg.Trends: Northeast-Southwest, Both Schist And Quartz Traversed By Joints
Tectonic:	Appalachian Foldbelt

References

MRDS	W000905
DEP	10068001
Reference	{Deposit:: REED, J.C.JR. AND REED, J.C., 1969, USGS BULL. 1286, PP. 4-9}{Deposit:: PEARRE, N.C., 1961, MAP MR-12}{Deposit:: WEED, W.H., 1905, USGS BULL. 260, PP. 128-131}{Deposit:: INGALLS, E.T., 1960, THE DISCOVERY OF GOLD AT GREAT FALLS, MD., PRIVATELY PRINTED , 18 PP}{Deposit:: 1904 GEOCHEM E.T. ALLEN, ASSAY 4.25 OZ AU, 0.36 OZ AG/TO}{Production:: REED AND REED REF}{Reserve-Resource:: REED AND REED REF.}
Reporter	Wright, Nancy A.