USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Santa Clara County
Comstock
Unconfirmed Mercury Underground
Key facts
- State
- California
- County
- Santa Clara
- Mining district
- Stayton
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Mercury
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Hg occurrence/mine located in sec. 19, T12S, R7E, MDM, 6.3 km (3.9 miles) SE of Pacheco Peak (coordinates of record), approximately 13.9 km (8.7 miles) E of Hollister (San Benito County). Discovered in 1870. Owned by T.H. French. Started in th…
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- USGS MRDS working type: Underground
- MRDS work_type documents underground workings: Underground · work_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
USGS source data documents underground workings for this record.
History & operations
Historical record
- Development status: Past Producer
Operators / organizations
- French, T. H. · Source-reported owner
Commodities & minerals
Reported minerals
- Chalcedony
- Pyrite
- Cinnabar
- Chalcedony
- Cinnabar
- commodity:Mercury
- Metacinnabar
- Native Mercury
View all 10 reported minerals
- Chalcedony
- Pyrite
- Cinnabar
- Chalcedony
- Cinnabar
- commodity:Mercury
- Metacinnabar
- Native Mercury
- Pyrite
- Quartz
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 10270
Supports:
- locality identity
- reported minerals (7)
A Mindat locality match does not by itself establish underground workings.
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