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Eureka Claim

Occurrence in Ventura county in California, United States with commodity Gypsum-Anhydrite
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10023818
MRDS ID I003011
Record type Site
Current site name Eureka Claim

Geographic coordinates

Geographic coordinates: -119.06037, 34.78943 (WGS84)
Relative position ABOUT 0.5 MI NE OF COLUMBUS MINE.

Site location context

Political divisions (FIPS codes)

Ventura(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cuddy Valley(quadrangle 1:24,000 scale)

Cuyama(quadrangle 1:100,000 scale)

Los Angeles(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Kern-Upper Tehachapi-Grapevine(hydrologic unit)

Tulare-Buena Vista Lakes(hydrologic accounting unit)

Tulare-Buena Vista Lakes(hydrologic subregion)

California(hydrologic region)

Federal lands

Los Padres National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Ventura

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 008N 021W California

Commodities

Commodity Importance
Gypsum-Anhydrite Primary

Materials information

Materials Type of material
Gypsum Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -119.06037, 34.78943
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Extensive Folding And Faulting

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Significant No
Discovery year 1898

Mining district

District name Ventura County Borate District

Comments on the workings information

  • TUNNEL AT SHALLOW DEPTH NEAR RIDGE SUMMIT.

Comments on development

  • THIS WAS PROBABLY A BORATE PROSPECT, BUT NO BORATES PRESENT.

Reference information

Bibliographic references

  • Deposit

    GALE, H.S., 1912, BORATE DEPOSITS IN VENTURA COUNTY, CALIFORNIA: USGS BULL 540, P. 434-456

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit SPATIAL ASSOCIATION OF BASALT WITH DEPOSITS. THE ABUNDANT GYPSUM AT THIS SITE WAS PROBABLY CONSIDERED (FALSELY) TO BE A FAVORABLE INDICATION OF BORATES AT DEPTH. THE GYPSUM IS PROBABLY A SECONDARY PRODUCT DEPOSIT ALONG BEDDING PLANES AND FRACTURES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1993 Orris, Greta 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.