| Deposit ID | 10068001 |
|---|---|
| MRDS ID | W000905 |
| Record type | Site |
| Current site name | Maryland Mine |
| Alternate or previous names | Great Falls Mine? |
| Related records | 10194373 |
| Geographic coordinates: | -77.23162, 38.99559 (WGS84) |
|---|---|
| Elevation | 114 |
| Relative position | SOUTH OF MACARTHUR BLVD. WHERE IT MEETS FALLS RD |
Political divisions (FIPS codes)
Montgomery(county)
Maryland(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Falls Church(quadrangle 1:24,000 scale)
Washington West(quadrangle 1:100,000 scale)
Washington(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Middle Potomac-Catoctin(hydrologic unit)
Potomac(hydrologic accounting unit)
Potomac(hydrologic subregion)
Mid Atlantic(hydrologic region)
Federal lands
Chesapeake and Ohio Canal National Historic Park(National Historic Park)
National Historic Park NPS(Type of land area)
NPS(Federal land areas administered by NPS)
| Country | State | County |
|---|---|---|
| United States | Maryland | Montgomery |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Galena | Ore |
| Pyrite | Ore |
| Pyrrhotite | Ore |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist > Mica Schist |
| Rock unit name | Mica Schist, Wissahickon Formation |
| Rock description | Mica Schist, Wissahickon Formation |
| (1) | -77.23162, 38.99559 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Reg.Trends: Northeast-Southwest |
| Type of structure | Local |
| Structure description | Both Schist And Quartz Traversed By Joints |
| General form | LINEAR |
|---|---|
| Strike | N-S |
| Dip | 85 DEG W |
| Width | 3.66M |
| Depth to top | 15.24M |
| Depth to bottom | 60.96M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Medium |
| Significant | No |
| Discovery year | 1860 |
| Discoverer | Private Carey (Or Mccleary) |
| Year of first production | 1868 |
| District name | Great Falls |
|---|
| Type | Operator |
|---|---|
| Owner | Md. Mining Co. |
| First year | 1940 |
| Type | Owner |
|---|---|
| Owner | Great Falls Farms Corp. |
| Type of workings | Underground |
|---|---|
| Length | 106.68M |
| Overall depth | 64.01M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W000905 |
REED, J.C.JR. AND REED, J.C., 1969, USGS BULL. 1286, PP. 4-9
PEARRE, N.C., 1961, MAP MR-12
WEED, W.H., 1905, USGS BULL. 260, PP. 128-131
INGALLS, E.T., 1960, THE DISCOVERY OF GOLD AT GREAT FALLS, MD., PRIVATELY PRINTED , 18 PP
1904 GEOCHEM E.T. ALLEN, ASSAY 4.25 OZ AU, 0.36 OZ AG/TO
REED AND REED REF
REED AND REED REF.
| Subject category | Comment text |
|---|---|
| Deposit | 3 SHAFTS SUNK, 1 IN 1867 TO 100 FT., 1 AROUND 1900 TO 150 FT, 1 IN 1906 TO 210 FT |
| Deposit | WHEN THE MINE CLOSED IN 1940 THERE WAS A 10-STAMP MILL, BALL MILL, AND 2 JAW CRUSHER. REED AND REED REF. HAS A PHOTO OF THE RUINS AND AN ISOMETRIC BLOCK DIAGRAM. THE MINE IS INDICATED ON THE FALLS CHURCH 1971 TOPO SHEET ; INFO.SRC : 1 PUB LIT |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUL-1972 | Wright, Nancy A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.