USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Los Angeles County
Offset Mine
Unconfirmed Gold Underground 1 mapped shaft
Key facts
- State
- California
- County
- Los Angeles
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Gold
- Verification
- Unconfirmed
Also known as
- Unnamed Mine
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Au-Ag mine located about 12½ miles NNE of Lake Los Angeles and just S of the Edwards Air Force Base perimeter.
Additional documented workings
-
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
- Shaft : Jackrabbit Hill , 1973
View individual source records (3)
Every underlying record used to build the summary above, for research/verification use.
-
Shaft
Mapped on historical USGS topographic data (Mine Shaft). Historical map features may no longer exist in the field.
- Derived from MRDS oper_type (existing operation): Underground
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Underground · oper_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
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)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 81376
Supports:
- locality identity
A Mindat locality match does not by itself establish underground workings.
Related underground mines
Big Chief
California · Los Angeles County
Unconfirmed Gold Past Producer
Documented adit evidence
Black Cargo Mine
California · Los Angeles County
Unconfirmed Gold Past Producer
Historical mapped workings available
Baldora Mine
California · Los Angeles County
Unconfirmed Gold Past Producer
Documented adit evidence
Big Horn Mine
California · Los Angeles County
Unconfirmed Gold Past Producer
Documented adit evidence