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  3. Mineral Resource Data System (MRDS)

Agnew Meadows Deposits

Occurrence in Madera 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. Ore body information
  10. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10095174
MRDS ID M020057
Record type Site
Current site name Agnew Meadows Deposits
Alternate or previous names Mammoth Lakes
Related records 10139036

Geographic coordinates

Geographic coordinates: -119.0829, 37.68243 (WGS84)
Elevation 2591
Location accuracy 1000(meters)
Relative position 10 MI. FROM MAMMATH, IN THE UPPER PART OF THE CANYON OF THE MIDDLE FORK OF THE SAN JOAQUIN RIVER., Lat/Long Estimated At Culture Evidence In Agnew Meadows.

Site location context

Political divisions (FIPS codes)

Madera(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mammoth Mountain(quadrangle 1:24,000 scale)

Yosemite Valley(quadrangle 1:100,000 scale)

Mariposa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper San Joaquin(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Inyo National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Madera

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003S 026E California

Comments on the location information

  • CENTER OF T. 35. IN INYO NATIONAL FOREST.

Commodities

Commodity Importance
Manganese Critical Tertiary

Materials information

Materials Type of material
Garnet Ore
Rhodochrosite Ore
Rhodonite Ore
Pyrite Gangue

Nearby scientific data

(1) -119.0829, 37.68243
ListMap

Economic information

Ore body information

  • Length 3.05M
    Width 1.83M

Comments on the geologic information

  • GEOL.DESC: HYDROTHERMAL DEPOSITS OF VEIN ORIGIN AT THE INTERSECTION OF THE VERTICAL MINERALIZED ZONES AND SCHIST. MINERALIZED ZONES STRIKE N 40 E AND ARE ESSENTIALLY VERTICAL. THEY ARE CHARACTERIZED BY GARNET, SOME OF WHICH IS TYPICAL SKARN, AND BY PYRITE, EPIDOTE, RHODONITE, RHODOCHROSITE, PIEDMONTITE (?) AND A GREEN MINERAL THAT WEATHERS TO A BLACK MANGANESE OXIDE (JOHANNSENITE?). THE RHODONITE IS IN A LOCALIZED ZONE, 2 TO 3 FEET WIDE, AND THE RHODOCHROSITE IN A SIMILAR ZONE ABOVE THE RHODONITE.

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. 103

  • Deposit

    D.O.M. BULL. 125 1943 P. 130

General comments

Subject category Comment text
Deposit HYDROTHERMAL DEPOSITS OF VEIN ORIGIN AT THE INTERSECTION OF THE VERTICAL MINERALIZED ZONES AND SCHIST. MINERALIZED ZONES STRIKE N 40 E AND ARE ESSENTIALLY VERTICAL. THEY ARE CHARACTERIZED BY GARNET, SOME OF WHICH IS TYPICAL SKARN, AND BY PYRITE, EPIDOTE, RHODONITE, RHODOCHROSITE, PIEDMONTITE (?) AND A GREEN MINERAL THAT WEATHERS TO A BLACK MANGANESE OXIDE (JOHANNSENITE?). THE RHODONITE IS IN A LOCALIZED ZONE, 2 TO 3 FEET WIDE, AND THE RHODOCHROSITE IN A SIMILAR ZONE ABOVE THE RHODONITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-77 Killman, K.; Albers, J. U.S. Geological Survey REPLACING LOST LOCATION.
Updater 13-NOV-97 Oland, G. P. (Orris, Greta J.) U.S. Geological Survey OLAND AND ORRIS MERGED RECORDS
Editor 08-MAY-98 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.