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Holst-Weeks Prospect

Occurrence in Sonoma county in California, United States with commodity Manganese
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Links to other databases
  10. Bibliographic references
  11. Reporter information

Geologic information

Identification information

Deposit ID 10033634
MRDS ID M020247
Record type Site
Current site name Holst-Weeks Prospect
Alternate or previous names Holst, Weeks
Related records 10141690

Geographic coordinates

Geographic coordinates: -122.58495, 38.486 (WGS84)
Relative position 10 MI. BY ROAD N. E. OF SANTA ROSA. ABOUT 150 YARDS S. OF SUMMIT OF PROMINENT E - W RIDGE

Site location context

Political divisions (FIPS codes)

Sonoma(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kenwood(quadrangle 1:24,000 scale)

Napa(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 007N 007W 01 California

Comments on the location information

  • LOCATED IN N. CENTER SECTION 1

Commodities

Commodity Importance
Manganese Critical Tertiary

Analytical data

Result ASSAY 39.7 PERCENT SILICA, 2.0 PERCENT IRON OXIDES, 31.4 PERCENT MANESE.

Nearby scientific data

(1) -122.58495, 38.486
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: 5 TO 7 FT. THICK MASS OF METAMORPHOSED CHERT IS MOSTLY BRIGHT YELLOW, AND ALTERS TO EARTHY LIMONITIC MATERIAL. WITHIN THE CHERT ARE IRREGULAR MASSES OF RESINOUS, BROWN TO RED AND DULL BUFF MATERIAL EVIDENTLY A RESULT OF METAMORPHISM OF MANGANIFEROUS OPAL AND SILICEOUS CARBONATE. GREENSTONE IS FOUND 10 YARDS AWAY, IN PLACE. BLACK MANGANESE OXIDES ARE FOUND IN JOINTS IN MANGANESE BEARING MATERIAL.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 P. 284

  • Deposit

    D.O.M. BULL. 125 1943 P. 187

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 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.