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Harms

Prospect in Mendocino 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. 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. Reporter information

Geologic information

Identification information

Deposit ID 10097029
MRDS ID M010048
Record type Site
Current site name Harms
Related records 10187916

Geographic coordinates

Geographic coordinates: -123.17193, 39.46319 (WGS84)
Relative position ONE MI. N. OF THE FOSTER MOUNTAIN MINE, WHICH IS 16.4 MI. E. OF WILLITS.

Site location context

Political divisions (FIPS codes)

Mendocino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Foster Mountain(quadrangle 1:24,000 scale)

Ukiah(quadrangle 1:100,000 scale)

Ukiah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Eel(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mendocino

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 019N 012W 34 California

Comments on the location information

  • LOCATED IN NE 1/4 SECTION 34 , UTM APPROX.

Commodities

Commodity Importance
Manganese Critical Tertiary

Materials information

Materials Type of material
Psilomelane Ore
Pyrolusite Ore

Nearby scientific data

(1) -123.17193, 39.46319
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: TWO ORE BODIES INTERBEDDED IN CHERT LENS, WHICH IS OVERLAIN BY SANDSTONE AND SHALE, AND SURROUNDED BY GREENSTONE. THE CHERT IS CUT BY MANY SMALL FAULTS, AND STRIKES N 30 TO 35 W; AND DIPS 40 TO 55 N. E. INTO THE SLOPE. BEDS OF SILICEOUS ORE ARE OVERLAIN DISCONTINUOUSLY BY A THIN ZONE OF HIGH GRADE BLACK OXIDE ORE. ORE IS MAINLY PYROLUSITE WITH SOME PSILOMELANE AND OTHER OXIDES.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Leona Eddie

Comments on the production information

  • NO PRODUCTION, IDLE. MAIN BED OF LOWER ZONE IS SILICEOUS BLACK OXIDE ORE CONTAINING MUCH WHITE AND RED CHERT, SOME MANGANIFEROUS CHERT, ESTIMATED AVERAGES ARE 15 TO 30% MANGANESE WITH HIGH GRADE AVERAGING 45%; AN UPPER ZONE AVERAGES 15 TO 30%.

Comments on the workings information

  • TWO CUTS 15 AND 30 FT. LONG AT RIGHT ANGLES TO THE STRIKE, TWO OTHER CUTS 12 AND 30 FT.; SHALLOW PITS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOLOGY, V. 49, NO. 4, OCT. 1953, P. 386

  • Deposit

    D.O.M. BULL. 152, PP. 123-125

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.