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School Girl and Union

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. Production statistics
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10006900
MRDS ID C007695
Record type Site
Current site name School Girl and Union
Alternate or previous names Springfield
Related records 10187543

Geographic coordinates

Geographic coordinates: -120.82519, 38.64796 (WGS84)
Relative position 2 MI. SSE OF EL DORADO

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)

Upper Cosumnes(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(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 009N 010E 12 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

Nearby scientific data

(1) -120.82519, 38.64796
ListMap

Economic information

Ore body information

  • Strike N 16 E
    Dip 69.5
    Depth to top 0M

Comments on the geologic information

  • 5 VEINS 5 - 10 FT. THICK AVERAGE, DIP 60 TO 79 E. MAIN OR SPRINGFIELD SHAFT 320 FT. E OF HANGING WALL VEIN AT THE SURFACE, CROSSES VEIN AT 1200 FT. LEVEL. W. GOUGE VEIN ALSO CROSSED 60 FT. ABOVE 1600 FT. LEVEL. VEIN BREAKS INTO STRINGERS FURTHER N. ANOTHER VEIN TO E.

Economic information about the deposit and operations

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

Production statistics

  • Year 1867
    Period - 1867
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 41g/mt

Comments on the production information

  • RECORDS NEVER DISCLOSED. PRODUCTION BELIEVED OVER ESTIMATED, IN MOST CASES.

Comments on the workings information

  • MAIN SHAFT 1640 FT., CLEMENT SHAFT 900 FT. ON INCLINE OF 70 DEGREES. OVER 21000 FT. OF DRIFTS REPORTED TO BE RUN.

Reference information

Comments on the other database information

  • RECORD NUMBER 354 IS A POTENTIAL DUPLICATE OF THIS RECORD

Bibliographic references

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG. 267 .

  • Deposit

    LOGAN, C. A., 1935 ,MOTHER LODE GOLD BELT OF CALIF.: CALIF. DIV. MINES BULL. 108 , PG. 42 , 43 .

  • Production

    LOGAN, 1934

General comments

Subject category Comment text
Deposit VEIN, ORE SHOOTS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-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.