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Coursey Bros.

Prospect in Mendocino 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 10031356
MRDS ID M010062
Record type Site
Current site name Coursey Bros.
Related records 10139857

Geographic coordinates

Geographic coordinates: -123.30221, 39.44486 (WGS84)
Relative position ON THE S. SIDE OF DARBY RIDGE, 150 FT BELOW THE CREST.

Site location context

Political divisions (FIPS codes)

Mendocino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Willits(quadrangle 1:24,000 scale)

Ukiah(quadrangle 1:100,000 scale)

Ukiah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Eel(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 Mendocino

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 018N 013W 04 California

Commodities

Commodity Importance
Manganese Critical Tertiary

Nearby scientific data

(1) -123.30221, 39.44486
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: THIN BEDDED RED CHERT STAINED WITH MANGANESE, AND MANGANESE OXIDES IN SMALL VEINS AND SEAMS ALONG SLIPS. CHERT IS CRUMPLED AND FRACTURED NEAR CONTACT WITH GREENSTONE, AND INTENSELY MIRRORED WITH MANGANESE. MANGANESE STAINS ARE IN GREENSTONE NEAR CONTACT.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No

Comments on the production information

  • NO PRODUCTION. IDLE.

Comments on the workings information

  • PROSPECT

Reference information

Bibliographic references

  • Deposit

    CALIFORNIA JOURNAL OF MINES & GEOLOGY, V. 49, NO. 4 OCT. 1953, P. 385

  • Deposit

    D.O.M. BULL. 152, P. 119

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.