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  3. Mineral Resource Data System (MRDS)

Lewis

Occurrence 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 10031617
MRDS ID M010711
Record type Site
Current site name Lewis

Geographic coordinates

Geographic coordinates: -122.32467, 38.61128 (WGS84)

Site location context

Political divisions (FIPS codes)

Napa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chiles Valley(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)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States California Napa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 009N 004W 20 California

Comments on the location information

  • LOCATED IN SW 1/4 SE 1/4 SECTION 20

Commodities

Commodity Importance
Manganese Critical Tertiary

Comments on the commodity information

  • NO ECONOMIC VALUE

Analytical data

Result ORE GRADE LESS THAN 1 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -122.32467, 38.61128
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: MASSIVE RED RADIOLARIAN CHERT STAINED BLACK BY MANGANESE OXIDE. CHERT IS SURROUNDED BY FRANCISCAN GREENSTONE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Allen Lewis And Glenn C. Griffen

Comments on the production information

  • NO PRODUCTION

Reference information

Bibliographic references

  • Deposit

    CALIF. BULL. 125, 1943, P. 145

  • Deposit

    BULL. 152, 1950, P. 158

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.

External references

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.