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Reported Occurrence

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

Geologic information

Identification information

Deposit ID 10031493
MRDS ID M010378
Record type Site
Current site name Reported Occurrence
Related records 10286314

Geographic coordinates

Geographic coordinates: -123.45972, 39.62069 (WGS84)
Relative position 5.4 MI. SOUTH OF LAYTONVILLE, 4.8 MI. N. OF LONGVALE ON E. SIDE OF HIGHWAY 101.

Site location context

Political divisions (FIPS codes)

Mendocino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Longvale(quadrangle 1:24,000 scale)

Covelo(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 020N 014W 06 California

Commodities

Commodity Importance
Gemstone Primary

Materials information

Materials Type of material
Deerite Ore
Howieite Ore
Zussmanite Ore

Nearby scientific data

(1) -123.45972, 39.62069
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: HOWIEITE OCCURS IN RADIATING CLUSTERS OF BLADED, BLACK CRYSTALS DEERITE A BLACK MINERAL OCCURS IN SOMEWHAT FELTED LAYERS OF SUB- PARALLEL NEEDLELIKE CRYSTALS. ZUSSMANITE A GREEN MINERAL OCCURRING AS TINY TABULAR CRYSTALS OR GRAINS DISSEMINATED IN QUARTZ AND STILPNOMELANE. ALL IN QUARTZ-RICH ROCKS DERIVED BY METAMORPHISM OF CHERT.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    MIS V. 17, AUG. 1964, P. 138; V. 18 JAN. 1966, P.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. 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.