1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unknown

Occurrence in Calaveras county in California, United States with commodity Gemstone
Map
XML
JSON
KML
D
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 10028691
MRDS ID M005829
Record type Site
Current site name Unknown

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -120.76092, 38.27952 (WGS84)
Relative position Original record had no geographic coordinates; these coordinates were derived from the PLSS description provided.

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Jackson(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Mokelumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 005N 011E California

Commodities

Commodity Importance
Gemstone Primary

Nearby scientific data

Centroid (1) -120.76092, 38.27952
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: DEPOSIT OF OPALS OCCURRING NEAR THE SURFACE IN A PINK CLAY SEAM ENCLOSED IN ANDESITE TUFF AND BRECCIA. THE STONES ARE EACH ENCLOSED IN A SHELL OF PURE WHITE SILICA; MANY OF GOOD SIZE. PROMISING RESULTS BY A JEWELRY FIRM THAT CUT SOME OF THE OPALS. OCCURRENCE OF SIMILAR PINK SEAMS ALSO NOTED IN THE ANDESITE TUFF WHICH COVERS STOCKTON HILL, A LONG RIDGE RUNNING W FROM MOKELUMNE HILL; THIS IS ABOUT A MILE FROM THE FIRST DEPOSIT AND SEVERAL HUNDRED FEET LOWER.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    CALIF. REPT. 21, P. 170

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-72 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.