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Widow No. 7

Past Producer in Inyo county in California, United States with commodity Boron-Borates
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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.
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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

Nearby scientific data

(1) -116.66588, 36.29637
ListMap

Ore body information

  • General form WEDGE
    Thickness 45.72M
    Length 213.36M

Economic information

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

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS I000390

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