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Dewey's

Past Producer in Sonoma county in California, United States with commodity Mercury
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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. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10040825
MRDS ID M055700
Record type Site
Current site name Dewey's
Alternate or previous names Dewey, Big Red, Eagle Rock
Related records 10214480

Geographic coordinates

Geographic coordinates: -122.82914, 38.79821 (WGS84)
Relative position 22 MI NE OF HEALDSBURG

Site location context

Political divisions (FIPS codes)

Sonoma(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

The Geysers(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Russian(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 Sonoma

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 011N 009W 14 California

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Mercury Ore

Alteration

  • (Local) Silica Carbonate Alteration Of Serpentine

Host and associated rocks

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

Nearby scientific data

(1) -122.82914, 38.79821
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Serpentine - Sandstone Contact

Ore body information

  • General form LENSES

Controls for ore emplacement

  • Fault Intersections

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1940
Production years 1942 - 1947

Mining district

District name West Mayacmas

Ownership information

  • Type Owner
    Owner Geysers Development Co.

Workings at the site

  • Type of workings Surface/Underground
    Length 182.88M
    Overall length 1219.2M

Reference information

Bibliographic references

  • Deposit

    HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252

  • Deposit

    BAILEY, E. H., USGS, PERSONAL FILES

  • Deposit

    HONKE, M. T., JR. AND VER PLANCK, W. E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA, COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 46, P. 98 - 105

  • Deposit

    BAILEY, E. H., 1946, QUICKSILVER DEPOSITS OF THE WESTERN MAYACMAS DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 199 - 230

  • Production

    USBM DATA

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 Peterson, Jocelyn A. 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.