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Hearst Ranch - Marmelejo Creek Deposit

Occurrence in San Luis Obispo 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. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10033556
MRDS ID M020152
Record type Site
Current site name Hearst Ranch - Marmelejo Creek Deposit
Related records 10262155

Geographic coordinates

Geographic coordinates: -121.1646, 35.69774 (WGS84)
Relative position ON MARMELEJO CREEK 0.5 MI ABOVE THE CONFLUENCES OF BURNETT CREEK, AND 0.2 MI. FROM A GOOD ROAD TO SAN SIMEON, 10 MI. DISTANT, 5.1 MI. FROM THE RAILROAD AT SAN LUIS OBISPO.

Site location context

Political divisions (FIPS codes)

San Luis Obispo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Simeon(quadrangle 1:24,000 scale)

Cambria(quadrangle 1:100,000 scale)

San Luis Obispo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Coastal(hydrologic unit)

Central California Coastal(hydrologic accounting unit)

Central California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California San Luis Obispo

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 026S 007E 01 California

Comments on the location information

  • LOCATED IN S. CENTER OF SEC. 1; LATITUDE-LONGITUDE VALUES CALCULATED FROM TOWNSHIP, RANGE, SECTION.

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Rhodochrosite Ore

Analytical data

Result AVERAGE ABOUT 30 PERCENT MANGANESE

Nearby scientific data

(1) -121.1646, 35.69774
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Economic information

Comments on the geologic information

  • GEOL.DESC: ORE OCCURS AS LARGE BOULDERS IN CREEK BOTTOM. ONLY ORE IN PLACE IS AT CONTACT OF THE SANDSTONE AND SERPENTINE, BUT LANDSLIDING HAS MADE RELATIONSHIPS OBSCURE. BOULDERS UP TO 15 FT. IN DIAMETER CONSIST OF MANGANESE OXIDE AND CALCITE, WITH MANY SMALL RHODOCHROSITE VEINS CUTTING THE ORE.

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 PP. 230 - 231

  • Deposit

    D.O.M. BULL. 125 1943 P. 168

General comments

Subject category Comment text
Deposit ORE OCCURS AS LARGE BOULDERS IN CREEK BOTTOM. ONLY ORE IN PLACE IS AT CONTACT OF THE SANDSTONE AND SERPENTINE, BUT LANDSLIDING HAS MADE RELATIONSHIPS OBSCURE. BOULDERS UP TO 15 FT. IN DIAMETER CONSIST OF MANGANESE OXIDE AND CALCITE, WITH MANY SMALL RHODOCHROSITE VEINS CUTTING THE ORE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 Killman, K.; Albers, J. U.S. Geological Survey REPLACING LOST LOCATION.
Updater 12-NOV-1997 Oland, G. P. (Orris, Greta J.) U.S. Geological Survey OLAND AND ORRIS MERGED RECORDS
Editor 08-MAY-1998 Mason, George 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.