USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · San Luis Obispo County
Trinidad Mine
Unconfirmed Chromium Mixed Underground / Surface
Key facts
- State
- California
- County
- San Luis Obispo
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Chromium
- Verification
- Unconfirmed
Also known as
- La Trinidad
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Cr mine located 4.1 km (2.5 miles) N of Chorro. Mineralization is hosted in rocks of the Franciscan Formation, Tatoosh Pluton (dunite). Local structures include volcanic and sedimentary rocks folded into a syncline, which is roughly symm…
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- 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
Source records document both underground and surface mining.
History & operations
Historical record
- Development status: Past Producer
Operators / organizations
- Camp San Luis Obispo Military Res. Cal. National Guard · Source-reported owner · 1987
Commodities & minerals
Reported minerals
- Chromite
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: 92000
Supports:
- locality identity
- reported minerals (1)
A Mindat locality match does not by itself establish underground workings.
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