The Marin Co.No.25 is a mine located in Marin county, California at an elevation of 262 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Marin Co.No.25 MRDS details
Site Name
Primary: Marin Co.No.25
Commodity
Tertiary: Manganese
Location
State: California
County: Marin
Land Status
Land ownership: State Park
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Type: Located Claim
Workings
Not available
Ownership
Owner Name: Fort Baker Military Reservation-Marin Headlands State Pk
Percent: 100.0
Home Office: California
Info Year: 1975
Production
Not available
Deposit
Record Type: Site
Operation Category: Unknown
Operation Type: Surface
Mining Method: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Unknown: Pyrolusite
Comments
Comment (Reserve-Resource): THERE MAY BE AN ADDITIONAL 500,000 TONS OF 1-2 PCT.N.OF MAIN
References
Reference (Deposit): CALIF JOUR MINES AND GEOL V 51 NO 3 JULY 1955 P 279
Reference (Deposit): IN PIKE COUNTY GULCH ABOUT 1 MI S OF THE UNION GULCH MINE CO
Reference (Deposit): ON GULCH MINE BE SAME AS COPPER GULCH MINE MAY BE SECTION 18
California Gold
"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.
