USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Santa Clara County
Bernal
Unconfirmed Mercury Underground 1 mapped shaft 1 mapped adit
Key facts
- State
- California
- County
- Santa Clara
- Mining district
- New Almaden
- 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 the center SE¼ sec. 19, T8S, R2E, MDM, about 5.0 km NNE of New Almaden and 5.5 km (3.4 miles) SSE of Edenvale neighborhood proper, along the northern slope of the Santa Teresa Hills, on former private land, now on…
Additional documented workings
-
Adit
— documented in 1 source record.
USGS Historical Topographic Mine Features -
Shaft
— documented in 1 source record.
USGS Historical Topographic Mine Features
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 1 shaft symbol
- 1 adit symbol
- Shaft : Santa Teresa Hills , 1953
- Adit : Santa Teresa Hills , 1953
View individual source records (4)
Every underlying record used to build the summary above, for research/verification use.
-
Adit
Mapped on historical USGS topographic data (Adit). Historical map features may no longer exist in the field. -
Shaft
Mapped on historical USGS topographic data (Mine Shaft). Historical map features may no longer exist in the field.
- 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
- Pedro A Bernal · Source-reported owner
Commodities & minerals
Reported minerals
- Dolomite
- Quartz
- Cinnabar
- Cinnabar
- Clay
- commodity:Limestone
- commodity:Mercury
- Dolomite
View all 12 reported minerals
- Dolomite
- Quartz
- Cinnabar
- Cinnabar
- Clay
- commodity:Limestone
- commodity:Mercury
- Dolomite
- Limestone
- Quartz
- Serpentine Subgroup
- Serpentinite
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
USGS Historical Topographic Mine Features
Type: Historical mapped physical features
Dataset: DOI 10.5066/P9TAALR6
Supports:
- mapped shaft symbols (1)
- mapped adit symbols (1)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 92207
Supports:
- locality identity
- reported minerals (9)
A Mindat locality match does not by itself establish underground workings.
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