USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Sonoma County
Black Bear
Unconfirmed Mercury Underground
Key facts
- State
- California
- County
- Sonoma
- Mining district
- West Mayacmas
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Mercury
- Verification
- Unconfirmed
Also known as
- Buckman Group, Kentuck
Mine Location
Approximate AreaDocumented underground workings
Source classification: Underground operation documented
Specific physical workings are not yet documented in discrete records.
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
Commodities & minerals
Reported minerals
- Cinnabar
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
Related underground mines
Ann Belcher
California · Sonoma County
Unconfirmed Mercury Occurrence Underground
Buckeye
California · Sonoma County
Unconfirmed Mercury Past Producer Underground
Documented adit evidence
Culver Baer
California · Sonoma County
Unconfirmed Mercury Producer Mixed Underground/Surface
Historical mapped workings available
Cloverdale
California · Sonoma County
Unconfirmed Mercury Past Producer Mixed Underground/Surface
Historical mapped workings available