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  3. Mineral Resource Data System (MRDS)

Black Bear Mine

Occurrence in Santa Clara county in California, United States with commodity Manganese
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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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10033583
MRDS ID M020183
Record type Site
Current site name Black Bear Mine
Related records 10237614

Geographic coordinates

Geographic coordinates: -121.52046, 37.45325 (WGS84)
Elevation 945
Relative position 25 MI. S. E. OF LIVERMORE, NEAR THE SUMMIT OF THE W. SLOPE OF THE ARROYO MOCHO VALLEY.

Site location context

Political divisions (FIPS codes)

Santa Clara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Eylar Mountain(quadrangle 1:24,000 scale)

San Jose(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 Santa Clara

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 005S 004E 34 California

Commodities

Commodity Importance
Manganese Critical Primary

Nearby scientific data

(1) -121.52046, 37.45325
ListMap

Economic information

Ore body information

  • Thickness 0.91M

Comments on the geologic information

  • GEOL.DESC: INTERBEDDED LENSES OF MANGANESE ORE IN JASPER, UP TO 3 FT. THICK AND FAIRLY EXTENSIVE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 P. 246

  • Deposit

    D.O.M. BULL. 125 1943 P. 174

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 Killman, K.; 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.