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Cedar Mountain

Producer in Alameda county in California, United States with commodity Magnesite
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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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10027975
MRDS ID M004675
Record type Site
Current site name Cedar Mountain
Related records 10114223

Geographic coordinates

Geographic coordinates: -121.62853, 37.55935 (WGS84)
Relative position NEAR CENTER NE 1/4

Site location context

Political divisions (FIPS codes)

Alameda(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mendenhall Springs(quadrangle 1:24,000 scale)

Stockton(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Alameda

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 003E 27 California

Commodities

Commodity Importance
Magnesite Primary

Materials information

Materials Type of material
Magnesite Ore

Nearby scientific data

(1) -121.62853, 37.55935
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Ownership information

  • Type Owner
    Owner Hugh Walker
    First year 1950

Comments on the production information

  • WORKED SPASMODICALLY FOR SEVERAL YEARS; NO PRODUCTION REPORTED SINCE 1917. IN 1925 THERE WAS ABOUT A CARLOAD OF ORE ON HAND READY TO SHIP. THE MAGNESITE, AS A RULE, WAS OF EXCELLENT QUALITY. HOLDINGS IN 1925 WERE 160 ACRES. THE ROCK IS WHITE, PORCELLANEOUS, MASSIVE TO MAMMILLARY; FRACTURE IS CONCHOIDAL. IT OCCURS NEAR THE OUTER MARGIN OF A SERPENTINE BODY ON CEDAR MOUNTAIN

Comments on the workings information

  • GLORY HOLE AND CUT; TUNNELS; LARGEST PIT 30 FT. ACROSS AND 30 FT. DEEP

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 46, NO.2, APRIL 1950, P.299, 340, PL. 58

  • Deposit

    DOM BULL. 79, P.140

  • Deposit

    BULL. 140, P.62, PL.1

General comments

Subject category Comment text
Deposit ADD. REF. NO.4. DOM BULL. 176, 1957, P.314, 315

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. 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.