1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Black Point

Prospect in Lake county in California, United States with commodity Manganese
Map
XML
JSON
KML
C
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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Ownership information
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10030666
MRDS ID M008979
Record type Site
Current site name Black Point
Related records 10211799

Geographic coordinates

Geographic coordinates: -122.75468, 38.78821 (WGS84)
Relative position W. SIDE OF COBB MOUNTAIN, 3 MI. FROM THE CALISTOGA-KELSEYVILLE ROAD AND 31 MI. FROM CALISTOGA.

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)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Lake

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 011N 008W 21 California

Comments on the location information

  • UTM APPROX.; LATITUDE-LONGITUDE VALUES CALCULATED FROM TOWNSHIP, RANGE, SECTION.

Commodities

Commodity Importance
Manganese Critical Tertiary

Nearby scientific data

(1) -122.75468, 38.78821
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: COUNTRY ROCK IS THIN BEDDED RADIOLARIAN CHERT, DISCOLORED BY STAINS AND FILMS OF BLACK MANGANESE OXIDE. ORE OCCURS AS POCKETS AND LENSES IN MASSIVE CHERT, AND MORE SILICEOUS ORE FORMS BOLD OUTCROPS. THE ORE BODY CAN BE TRACED FOR 300 FT, AND HAS A RUDE BANDING IN ITS UPPER PART.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner M. W. Clark

Comments on the production information

  • NO PRODUCTION

Reference information

Bibliographic references

  • Deposit

    CALIF. B. 125, 1943, P. 124

  • Deposit

    CALIF. BULL. 152, PP. 87-88

General comments

Subject category Comment text
Deposit THE BEST ORE OCCURS IN POCKETS AND LENSES. A SAMPLE OF A HIGH-GRADE LENS CONTAINED 42.2% MANGANESE, 18.4% SILICA, AND 10.4% AVAILABLE OXYGEN.

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.

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.