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  3. Mineral Resource Data System (MRDS)

True Consolidated

Past Producer in El Dorado county in California, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10034925
MRDS ID M022007
Record type Site
Current site name True Consolidated
Alternate or previous names Young Harmon, Old Harmon, Halleck, Berry

Geographic coordinates

Geographic coordinates: -120.80796, 38.74212 (WGS84)
Relative position NW OUTSKIRTS OF PLACERVILLE

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Placerville(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N 011E 06,07 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -120.80796, 38.74212
ListMap

Economic information

Ore body information

  • Depth to top 0M

Comments on the geologic information

  • 2 VEINS IN SLATE ON MOTHER LODE. EAST VEIN HAS A GREENSTONE HANGING WALL. E VEIN AVERAGES 4 FT THICK, W VEIN 15 FT. 6 ORE SHOOTS KNOWN.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the production information

  • ACTIVE IN 1880S & 1890S. PROSPECTED ON OLD HARMON CLAIM.

Comments on the workings information

  • 1400 FT SOUTH DRIFT ADIT. 560 FT SHAFT ON OLD HARMON CLAIM.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., AND CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. OF MINES AND GEOL., VOL. 52 , NO. 4 , PG 422 , 536

  • Production

    CLARK AND CARLSON, 1956

General comments

Subject category Comment text
Deposit VEINS
Deposit ONE OF A NUMBER OF OPERATIONS OF THE PLACERVILLE GOLD MINING CO IN 1950'S ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Hayden, F. (Albers, J.) U.S. Geological Survey

Beyond USGS

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

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.