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Threemile Mountain Mines

Past Producer in Shenandoah county in Virginia, United States with commodity Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Land status
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10080730
MRDS ID W032077
Record type Site
Current site name Threemile Mountain Mines

Geographic coordinates

Geographic coordinates: -78.66862, 38.8781 (WGS84)
Elevation 552
Relative position 4 KM (2.5 MI) WEST-NORTHWEST OF COLUMBIA FURNACE.

Site location context

Political divisions (FIPS codes)

Shenandoah(county)

Virginia(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Wolf Gap(quadrangle 1:24,000 scale)

Front Royal(quadrangle 1:100,000 scale)

Charlottesville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North Fork Shenandoah(hydrologic unit)

Potomac(hydrologic accounting unit)

Potomac(hydrologic subregion)

Mid Atlantic(hydrologic region)

Federal lands

George Washington National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

George Washington and Jefferson National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Virginia Shenandoah

Comments on the location information

  • 1.2 KM (0.75 MI) NORTHWEST ON STATE ROAD 779 FROM ITS INTERSECTION WITH STATE ROAD 42, TURN NORTH (RIGHT TURN) ON TO DIRT DRIVEWAY FOR ABOUT 1 KM (0.6 MI) TO A RED GATE WITH A JEEP TRAIL JUST TO THE LEFT, FOLLOW JEEP TRAIL FOR 1.6 KM (1 MI) OVER THE MOUNTAIN CREST, MINE IS 70 M (230 FT) BELOW THE CREST ON THE NORTHWEST SLOPE OF THREEMILE MOUNTAIN. A SECOND MINE IS LOCATED ON THE NORTH END OF THE MOUNTAIN AT UTM COORDINATES N 4306650, E 702615 AND N 4306710, E 702750. TO REACH MINE FOLLOW JEEP TRAIL TO NORTHEAST FROM WHERE IT INTERSECTS WITH THE ORIGINAL JEEP TRAIL NEAR THE CREST FOR ABOUT 1.2 KM (0.75 MI). OTHER PROSPECT PITS EXTEND TO THE SOUTHWEST ON TO THE CONICVILLE QUAD.; PREVIOUS QUAD DESIGNATION = CONICVILLE (1966) 1:24000

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Limonite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Late Silurian
    Stratigraphic age (youngest) Late Silurian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Rose Hill Formation
    Rock description Rose Hill Formation

Nearby scientific data

(1) -78.66862, 38.8781
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ne-Sw Trend
Type of structure Local
Structure description Syncline, Paddy Mtn. Anticline, North Mtn. Fault, Thrust Fault

Ore body information

  • General form IRREGULAR

Comments on the geologic information

  • FOR GEOLOGY SEE YOUNG AND RADER (1974).

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1850
Year of first production 1850
Year of last production 1850

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner George Washington National Forest

Comments on the workings information

  • IN 1982, WORKINGS CONSISTED OF A LARGE OPEN CUT, SEVERAL SMALLER OPEN CUTS, SHAFTS, TUNNELS, AND NUMEROUS PITS AT THE SOUTHWESTERN MINE. THE NORTHEASTERN MINE CONSISTED OF TUNNELS, AT LEAST 5, SHAFTS AND PITS. ALL WORKINGS WERE CAVED. SOME ORE IS EVIDENT ON THE DUMPS.

Comments on development

  • ORE SHIPPED TO COLUMBIA FURNACE.

Reference information

Bibliographic references

  • Deposit

    YOUNG, R.S., AND RADAR, E.K., 1974, GEOLOGY OF THE WOODSTOCK, WOLF GAP, CONICVILLE, AND EDINBURG QUADRANGLES, VIRGINIA: VDMR, REPORT OF INVESTIGATIONS 35, 69 P

General comments

Subject category Comment text
Deposit Discovery Year: 1800'S (?)
Deposit IRON ORE FORMED LENTICULAR REPLACEMENTS OF SHALE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1982 Trimble, David C. (Sweet, Palmer C.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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