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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Williamson, Rosenthal, and Mertz Claims

Occurrence in Tuolumne county in California, United States with commodity Chromium
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10077885
MRDS ID W025955
Record type Site
Current site name Williamson, Rosenthal, and Mertz Claims
Related records 10238950

Geographic coordinates

Geographic coordinates: -120.3785, 37.80242 (WGS84)
Elevation 305

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chinese Camp(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001S 014E 36 California

Comments on the location information

  • CLAIM JUST NE OF THE ACE OF SPADES MINE (M100597). ; INFO FROM LAND.ST :UNDETERMINED

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Alteration

  • (Local) Serpentinized Host Rock

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -120.3785, 37.80242
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Economic information

Ore body information

  • General form IRREG

Comments on the geologic information

  • THE DEPOSIT OCCURS IN THE SOUTHERN PART OF THE WESTERNMOST OF TWO SERPENTINE BELTS THAT TREND NW ACROSS THE COUNTY. THE BELT IS EXPOSED OVER AN AREA 30 KM BY 6 KM.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Marsh'S Flat Area

Ownership information

  • Type Owner
    Owner Williamson, Rosenthal, And Mertz

Comments on development

  • SOME DEVELOPMENT WORK DONE ON CLAIMS BUT WORKINGS COULD NOT BE FOUND IN 1945. 10 TONS ORE MINED BUT NOT SHIPPED.

Reference information

Bibliographic references

  • Deposit

    CATER, F.W.JR., 1948, CDMG BULL 134, PART 3, CHAPT.1, P. 15, 16

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1982 Oster, Karel L. (Albers, John P.) 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.