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Moore Creek Manganese Ridge Prospect

Producer in Napa 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. Host and associated rocks
  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 10031636
MRDS ID M010747
Record type Site
Current site name Moore Creek Manganese Ridge Prospect

Geographic coordinates

Geographic coordinates: -122.39412, 38.53961 (WGS84)
Elevation 366
Relative position ON MANGANESE RIDGE, A SPUR OF THE MAIN RIDGE THAT SEPARATES CONN VALLEY AND MOORE CREEK.

Site location context

Political divisions (FIPS codes)

Napa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Saint Helena(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Pablo 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 Napa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 008N 005W 15 California

Commodities

Commodity Importance
Manganese Critical Primary

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Rock unit name Franciscan Complex
    Rock description Franciscan Complex

Nearby scientific data

(1) -122.39412, 38.53961
ListMap

Economic information

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: LENSES IN THIN BEDDED RED RADIOLARIAN CHERT AND SHALE. ORE IS IN CLOSE ASSOCIATION WITH THICK BEDS OF MASSIVE RED JASPER LENSES IN THIN BEDDED CHERT. ORE VARIES FROM MANGANIFEROUS CHERT TO MANGANESE OXIDE WITH SMALL AMOUNT OF SILICA. MAIN ORE FOUND DEEP IN WORKINGS IS A RED - BROWN GRANULAR MATERIAL, WHICH OXIDIZES ON EXPOSURE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Ownership information

  • Type Operator
    Owner C. E. Wolcott

Comments on the production information

  • PRODUCTION 150 TO 999 TONS. PROPERTY HAS PRODUCED ABOUT 300 TONS OF ORE; AVERAGE GRADE WAS 44% MANGANESE AND 19% SILICA.

Comments on the workings information

  • OPEN CUT, TUNNEL.

Reference information

Bibliographic references

  • Deposit

    CALIF. BULL. 125, 1943, P. 146

  • Deposit

    CALIF. BULL. 76, 1918, P. 51

  • Deposit

    REPT. 25, 1929, P. 219; ADD. REF.: BULL. 152, 1950, PP. 158-9

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.