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Widow No. 7

Past Producer in Inyo county in California, United States with commodity Boron-Borates
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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. Mineral occurrence model information
  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. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10023430
MRDS ID I000390
Record type Site
Current site name Widow No. 7
Alternate or previous names Old Widow

Geographic coordinates

Geographic coordinates: -116.66588, 36.29637 (WGS84)
Relative position ABOUT 2 MI S OF RYAN.

Site location context

Political divisions (FIPS codes)

Inyo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ryan(quadrangle 1:24,000 scale)

Death Valley Junction(quadrangle 1:100,000 scale)

Death Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Death Valley-Lower Amargosa(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Federal lands

Death Valley National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State County
United States California Inyo

Public Land Survey System information

Meridian Township Range Section Fraction State
025N 003E 17 California

Commodities

Commodity Importance
Boron-Borates Primary

Materials information

Materials Type of material
Colemanite Ore
Ulexite Ore
Calcite Gangue

Mineral occurrence model information

Model code 260
USGS model code 35b.3
Deposit model name Lacustrine borates

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Furnace Creek Formation
    Rock description Furnace Creek Formation

Economic information

Ore body information

  • General form WEDGE
    Thickness 45.72M
    Length 213.36M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Year of first production 1915

Mining district

District name Ryan Area

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner U.S. Borax And Chemical Co.
    First year 1976

Comments on the reserve resource information

  • EVANS AND OTHERS REPORT THAT 50% OF RESERVES/RESOURCES ARE RECOVERABLE.

Reference information

Bibliographic references

  • Deposit

    EVANS, J.R., TAYLOR, G.C., AND RAPP, J.S., 1976, MINES AND MINERAL DEPOSITS IN DEATH VALLEY NATIONAL MONUMENT, CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY SPECIAL REPORT 125, 61 P

  • Other Database

    CIMRI

  • Reserve-Resource

    EVANS AND OTHERS, 1976.

General comments

Subject category Comment text
Deposit THE DEPOSIT IS WEDGE-SAHPED, OPENING DOWN DIP. THE UPPER CONTACT DIPS ABOUT 20 DEG. AND IS PARALLEL TO BEDS. THE LOWER CONTACT DIPS 30-40 DEG. AND IS STEEPER THAN THE BEDS. THE DEPOSIT PINCHES OUT ABRUPTLY. SHALE LAYERS IN THE DEPOSIT THICKEN DOWN DIP.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1992 Carbonaro, Marguerite M. 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.