USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Sonoma County
Sonoma Mine (Mount Jackson, Great Eastern, and Roaring Lion)
Unconfirmed Mercury Mixed Underground / Surface
Key facts
- State
- California
- County
- Sonoma
- Mining district
- Guerneville
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Mercury
- Verification
- Unconfirmed
Also known as
- Great EasternMount Jackson, Roaring Lion Prospect
- Mt. Jackson, Great Eastern, Sonoma Mine, Mount Jackson
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 (3)
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
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Surface-Underground · oper_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
Source records document both underground and surface mining.
History & operations
Historical record
- Development status: Past Producer
Operators / organizations
- Piombo Corp. · Source-reported owner · 1982
- Sonoma Quicksilver Mines · Source-reported owner · 1950
Commodities & minerals
Reported minerals
- Calcite
- Chalcedony
- Dolomite
- Limonite
- Magnetite
- Opal
- Pyrite
- Quartz
View all 10 reported minerals
- Calcite
- Chalcedony
- Dolomite
- Limonite
- Magnetite
- Opal
- Pyrite
- Quartz
- Chromite
- Cinnabar
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
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Historical mapped workings available