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Germolie Rodonick

Occurrence in Amador 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. Land status
  11. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10095062
MRDS ID M005154
Record type Site
Current site name Germolie Rodonick

Geographic coordinates

Geographic coordinates: -120.75658, 38.47684 (WGS84)
Elevation 488
Relative position 3 MI BY ROAD SOUTH OF FIDDLETOWN

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Amador City(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Mokelumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Amador

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 007N 011E 10 California

Comments on the location information

  • LOCATED IN NW 1/4 SECTION 10

Commodities

Commodity Importance
Manganese Critical Tertiary

Analytical data

Result MANGANESE ORE ABOUT 20 PERCENT

Nearby scientific data

(1) -120.75658, 38.47684
ListMap

Economic information

Ore body information

  • Strike N 25 W
    Dip 65 NE

Comments on the geologic information

  • GEOL.DESC: BED OF MASSIVE, MAGANIFEROUS META-CHERT; RECRYSTALLIZED TO FINE GRAINED GREY QUARTZITE AND CUT BY NARROW QUARTZ VEINLETS. IT IS PENETRATED BY MANGANESE OXIDES AND CONTAINS POCKETS 3 TO 4 INCHES WIDE OF HIGH GRADE ORE. THE MASSIVE METACHERT IS ENCLOSED IN A BELT OF RHYTHEMICALLY BEDDED WHITE TO GREY META-CHERT; 50 TO 100 FT. WIDE; 500' LONG. THE BEDDED METACHERT OCCURS WITH BEDS 1/2 TO 2 IN. THICK; WITH THIN SHALE PARTINGS. SOME RHODOCROSITE WAS FOUND ON DUMP.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Paul Germolis, Et Al

Comments on the production information

  • THE GENERAL RUN OF THE BED IS PROBABLY FAIRLY LOW GRADE, PERHAPS RUNNING 20 PERCENT MANGANESE. SOME FRAGMENTS ON ONE OF THE DUMPS CONSISTS OF BROWN TO PINK RHODOCHROSITE STAINED WITH BLACK OXIDES; NO OTHER UNOXIDIZED MANGANESE MINERALS WERE NOTED. THE BED OF ORE EXPOSED IS RATHER SMALL.

Comments on the workings information

  • OPEN CUT 8 FT. BY 8 FT. AND 6 FT. DEEP, ON S. BANK OF STREAM

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 50, NO. 1, JAN. 1954, P. 268

  • Deposit

    DOM BULL. 152, P. 30

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. U.S. Geological Survey
Updater 01-NOV-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.