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Impassable Rock

Occurrence 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. 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 10095175
MRDS ID M020064
Record type Site
Current site name Impassable Rock
Alternate or previous names Rhodochrosite, San Hedrin
Related records 10261729

Geographic coordinates

Geographic coordinates: -123.1247, 39.53764 (WGS84)
Relative position S. W. SIDE OF IMPASSABLE ROCK, 3 MI. BY TRAIL FROM PACKOUT SPRING, WHICH IS 27 MI. FROM WILLILS.

Site location context

Political divisions (FIPS codes)

Mendocino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sanhedrin Mountain(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)

Federal lands

Mendocino National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Sanhedrin Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Mendocino

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 020N;019N 011W;011W 31;06 California

Comments on the location information

  • LOCATED IN SW 1/4 SECTION 31 , NE 1/4 SECTION 6 , UTM APPROX

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Rhodochrosite Ore

Nearby scientific data

(1) -123.1247, 39.53764
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: 3 SMALL ORE BODIES; SMALL BLOCK OF HIGH GRADE SLIGHTLY OXIDIZED CARBONATE ORE FAULTED INTO PRESENT POSITION, AND TWO BODIES OF HEAVILY STAINED CHERT. RELATIONS ARE OBSCURED BY COMPLEX FAULTING AND GREENSTONE INTRUSION. ORE IS LIGHT GRAY CARBONATE CUT BY SMALL RHODOCHROSITE VEINS.

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. 126

  • Deposit

    D.O.M. BULL. 125 1943 P. 136

Reporter information

Type Date Name Affiliation Comment
Reporter 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.