USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Sonoma County
Skaggs Springs
Unconfirmed Mercury Underground
Key facts
- State
- California
- County
- Sonoma
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Mercury
- Verification
- Unconfirmed
Also known as
- Star Springs
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A Hg mine located in secs. 23, 24 & 26, T10N, R11W, MDM, at Skaggs Springs, 15 miles NW of Healdsburg. Mineralization is hosted in rocks of the Franciscan Formation (sandstone and shale). The Franciscan rocks are cut by numerous fractures that have …
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
- Orpiment
- Realgar
- Cinnabar
- Metacinnabar
- Cinnabar
- Cristobalite
- Idrialite
- Illite
View all 15 reported minerals
- Orpiment
- Realgar
- Cinnabar
- Metacinnabar
- Cinnabar
- Cristobalite
- Idrialite
- Illite
- Metacinnabar
- Muscovite
- Napalite
- Opal
- Orpiment
- Realgar
- Siderite
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: 27906
Supports:
- locality identity
- reported minerals (11)
A Mindat locality match does not by itself establish underground workings.
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Historical mapped workings available