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Massa Hill

Occurrence in Marin 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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Ownership information
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10030798
MRDS ID M009218
Record type Site
Current site name Massa Hill

Geographic coordinates

Geographic coordinates: -122.67578, 38.17767 (WGS84)
Relative position PROBABLY NEAR W1/4 COR. ON VONSON RANCH APPROX. 1 MILE SW OF UNION SCHOOL.

Site location context

Political divisions (FIPS codes)

Marin(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Petaluma(quadrangle 1:24,000 scale)

Napa(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Pablo Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Marin

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004N 007W 19 California

Commodities

Commodity Importance
Gemstone Primary

Nearby scientific data

(1) -122.67578, 38.17767
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Significant No
Discovery year 1950

Ownership information

  • Type Operator
    Owner M. Vonson

Comments on the production information

  • BOTH PROFESSIONAL AND AMATEUR LAPIDARISTS HAVE PRODUCED PLEASING CABOCHONS FROM THE DARKER STONE.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 51, NO. 3, JULY 1955, P. 259, 280, PL. 4

  • Deposit

    DOM SPEC. REPORT 10-B, 1951.

General comments

Subject category Comment text
Deposit Discovery Year: JAN. 1950
Deposit COLOR OR THE NEPHRITE RANGES FROM PALE TO DARK BLUISH GREEN. BODIES ARE A MAXIMUM OF 6 INCHES THICK AND UP TO 5 FT. LONG. NOTE: DOM REFERENCES INDICATE WRONG TOWNSHIP - SHOWN AS 19, 5N, 7W, BUT ARE CORRECT AS SHOWN ABOVE, ACCORDING TO DESCRIPTION OF LOCATION AND PETALUMA, CALIF. QUAD. (USGS) 1953.

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.