USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Inyo County
Green Monster
Unconfirmed Copper Underground
Key facts
- State
- California
- County
- Inyo
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Copper
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
The names of a few more mines in the Harrisburg vicinity now come to light: the Blue Jay Group, near the Cashier; the Jockey Club Group; adjoining the Cashier claims; and the Rosalind S., Hearst Junior, Hearst Second, and Wilson lodes in the vicinity o…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 2 shaft symbols
- 15 adit symbols
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
- Brochantite
- Chrysocolla
- Clinochlore
- Dioptase
- Garnet Group
- Gypsum
- Nontronite
- Quartz
View all 12 reported minerals
- Brochantite
- Chrysocolla
- Clinochlore
- Dioptase
- Garnet Group
- Gypsum
- Nontronite
- Quartz
- Tangeite
- Vésigniéite
- Volborthite
- Wad
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 (2)
- mapped adit symbols (15)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 258786
Supports:
- locality identity
- reported minerals (12)
A Mindat locality match does not by itself establish underground workings.
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Historical mapped workings available