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  3. Mineral Resource Data System (MRDS)

Downey Estate

Occurrence in Lake 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. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10092305
MRDS ID M008922
Record type Site
Current site name Downey Estate
Related records 10115302

Geographic coordinates

Geographic coordinates: -122.66357, 38.73071 (WGS84)
Relative position ON THE ROAD FROM MIDDLETOWN TO THE HELEN MINE, 0.1 MI. W. OF THE ROAD TO THE VON GLAHN RANCH, AND ABOUT 3 MILES FROM MIDDLETOWN ON LAND OF THE DOWNEY ESTATE.

Site location context

Political divisions (FIPS codes)

Lake(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Saint Helena(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Lake

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N 007W 08 California

Comments on the location information

  • LOCATED IN NW 1/4 SECTION 8

Commodities

Commodity Importance
Manganese Critical Tertiary

Economic information

Ore body information

  • Thickness 0.91M

Comments on the geologic information

  • GEOL.DESC: 3 FT. BED OF MANGANESE ORE IS ENCLOSED IN THIN BEDDED RED CHERT, STRIKING N 60 W AND DIPPING STEEPLY TO THE N.E. SMOOTHLY ROUNDED SURFACE OF DULL BLACK OXIDE MAY BE A COATING DUE TO LEACHING OF MANGANESE, OR AN ACTUAL BED OF ORE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Downey (Estate)

Comments on the production information

  • NO PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    CALIF. B. 125, 1943, P. 124

  • Deposit

    CALIF. BULL. 152, P. 90

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1977 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.