Mines in Marin County, California

Marin County, California has 134 mine and mineral deposit locations documented in federal records from the USGS and MSHA. 20 of these are currently active mining operations. The most commonly recorded commodity is stone, crushed/broken, with 33 sites. The table below lists all recorded mines in the county with links to individual site details.

All Mines in Marin County

Mine	Commodity	Type	Status	Source
San Rafael Rock Quarry	Crushed, Broken Stone NEC	Surface	Active	MSHA
Angel Island Dredge	Sand and Gravel, Construction	Underground	Producer	MRDS
Borello Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Dillon Beach Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Edwards	Mercury		Producer	MRDS
Freeman and Sondgroth	Flagstone	Surface	Producer	MRDS
Gambonini	Mercury		Producer	MRDS
Ghilotti Brothers Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Greenbrae	Sand and Gravel, Construction	Surface	Producer	MRDS
Knutte	Manganese		Producer	MRDS
L P McNear Brick Co	Clay	Surface	Producer	MRDS
Lafranchi Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Martinelli Ranch Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Martinoni Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Massa Hill	Gemstone		Producer	MRDS
McNears Quarry & Mill	Stone, Crushed/Broken	Surface	Producer	MRDS
Petaluma Mine	Mercury	Surface	Producer	MRDS
San Rafael Quarry	Stone	Surface	Producer	MRDS
Sausalito Point	Manganese		Producer	MRDS
Sulsan Bay Dredge	Sand and Gravel, Construction	Offshore	Producer	MRDS
Bender	Tungsten		Occurrence	MRDS
Bender Dell Bender	Tungsten		Occurrence	MRDS
Black Mountain	Stone, Crushed/Broken		Occurrence	MRDS
Black Mountain	Stone		Occurrence	MRDS
Black Point	Sand and Gravel, Construction, Stone, Crushed/Broken		Occurrence	MRDS
Black Point	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Burdell Mountain	Stone, Crushed/Broken		Occurrence	MRDS
Burdell Mountain	Stone, Crushed/Broken		Unknown	MRDS
Chileno Valley	Mercury	Underground	Unknown	MRDS
Chileno Valley Stone	Stone, Crushed/Broken		Unknown	MRDS
Claim	Mercury		Occurrence	MRDS
Claim	Mercury		Occurrence	MRDS
Claim	Mercury		Occurrence	MRDS
Claim	Mercury		Occurrence	MRDS
Claims	Mercury		Occurrence	MRDS
Claims	Mercury		Occurrence	MRDS
Claims	Mercury		Unknown	MRDS
Edwards	Mercury	Surface-Underground	Prospect	MRDS
Escalle Quarry	Stone, Crushed/Broken		Occurrence	MRDS
Escalle Quarry	Stone	Surface	Unknown	MRDS
Forbes Quarry	Stone, Crushed/Broken		Occurrence	MRDS
Forbes Quarry	Stone	Surface	Unknown	MRDS
Fort Baker	Manganese, Gold		Occurrence	MRDS
Fort Baker		Surface	Occurrence	MRDS
Ft Baker	Stone	Surface	Unknown	MRDS
Ft. Baker	Stone, Crushed/Broken		Occurrence	MRDS
Gambonini	Mercury	Surface-Underground	Past Producer	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Prospect	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Prospect	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Prospect	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Unknown	MRDS
Greenbrae Quarry	Stone, Crushed/Broken		Occurrence	MRDS
Heaton's Flat	Gold	Placer	Past Producer	MRDS
Hoffman	Stone, Crushed/Broken		Occurrence	MRDS
Hoffman	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Hotaling	Stone		Occurrence	MRDS
Hotaling	Stone, Crushed/Broken	Surface	Unknown	MRDS
Inverness	Tungsten		Occurrence	MRDS
Inverness Ridge	Gold		Occurrence	MRDS
Inverness Ridge	Gold	Placer	Unknown	MRDS
Knutte Deposit			Unknown	MRDS
L P McNear Brick Company	Clay		Past Producer	MRDS
Lime Point	Gemstone		Occurrence	MRDS
Maillard Ranch			Occurrence	MRDS
Maillard Ranch	Manganese		Occurrence	MRDS
Maillard Ranch	Chromium		Occurrence	MRDS
Marin	Stone		Occurrence	MRDS
Marin Co.no.25		Surface	Unknown	MRDS
Massa Hill	Gemstone		Occurrence	MRDS
Massa Hill	Gemstone	Surface	Past Producer	MRDS
Mazza Mazza Ranch			Prospect	MRDS
Mazza Prospect		Surface	Prospect	MRDS
McKinnan Gulch			Occurrence	MRDS
McKinnan Gulch	Copper		Prospect	MRDS
McNear Point Quarry	Stone, Crushed/Broken		Occurrence	MRDS
Mount Tamalpais Cemetery Quarry	Stone, Dimension	Surface	Unknown	MRDS
Mount Tamalpais Cemetery Quarry.	Stone, Stone, Dimension, Stone, Crushed/Broken		Occurrence	MRDS
Mt Tamalpais	Silver		Occurrence	MRDS
Mt. Tamalpais	Silver		Occurrence	MRDS
Negro Hill	Stone		Occurrence	MRDS
Nicasio Rock Quarry	Construction Sand and Gravel	Surface	Abandoned	MSHA
Noren	Tungsten		Occurrence	MRDS
Noren	Tungsten	Surface	Unknown	MRDS
Patent Brick Company	Clay		Past Producer	MRDS
Petaluma - Pt. Reyes			Occurrence	MRDS
Petaluma-Point Reyes Prospect			Occurrence	MRDS
Pike Gulch			Occurrence	MRDS
Pike Gulch	Copper	Underground	Prospect	MRDS
Point Bonita	Stone, Crushed/Broken	Surface	Prospect	MRDS
Point Bonita Fort Barry	Stone, Crushed/Broken		Occurrence	MRDS
Quarry	Stone, Crushed/Broken		Occurrence	MRDS
Quarry	Stone, Crushed/Broken	Surface	Unknown	MRDS
Quarrys	Sand and Gravel, Construction	Surface	Prospect	MRDS
Randall	Gold, Silver		Occurrence	MRDS
Randall	Silver		Unknown	MRDS
Remillard Brick Co.	Clay		Occurrence	MRDS
Remillard Brick Company	Clay	Surface	Past Producer	MRDS
San Geronimo	Gold		Occurrence	MRDS
San Geronimo	Gold	Underground	Prospect	MRDS
Sandpits	Sand and Gravel, Construction	Surface	Unknown	MRDS
Sandpits	Sand and Gravel, Construction	Surface	Unknown	MRDS
Sausalito Point Prospect			Occurrence	MRDS
Tiburon Ridge Flagstone	Stone, Stone, Dimension		Occurrence	MRDS
Tiburon Ridge Flagstone	Stone, Crushed/Broken	Surface	Unknown	MRDS
Tomales Point	Gold		Occurrence	MRDS
Tomales Point	Gold	Placer	Unknown	MRDS
Union Gulch	Copper		Past Producer	MRDS
Union Gulch	Copper		Unknown	MRDS
Unknown	Stone		Occurrence	MRDS
Unknown	Stone, Crushed/Broken		Occurrence	MRDS
Unknown	Stone		Occurrence	MRDS
Unknown	Stone, Crushed/Broken		Occurrence	MRDS
Unknown	Stone, Crushed/Broken, Limestone, General		Occurrence	MRDS
Unknown	Mercury		Occurrence	MRDS
Unknown	Stone, Crushed/Broken		Occurrence	MRDS
Unnamed Location	Stone, Crushed/Broken		Occurrence	MRDS
Unnamed Location	Mercury		Occurrence	MRDS
Unnamed Location	Stone, Crushed/Broken		Occurrence	MRDS
Unnamed Location	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Unnamed Location	Sand and Gravel, Construction	Surface	Unknown	MRDS
Unnamed Location	Stone		Occurrence	MRDS
Unnamed Location	Copper		Occurrence	MRDS
Unnamed Location	Gemstone		Occurrence	MRDS
Unnamed Location	Manganese		Occurrence	MRDS
Unnamed Location	Stone		Occurrence	MRDS
Unnamed Location	Gemstone		Occurrence	MRDS
Unnamed Location	Stone, Crushed/Broken		Occurrence	MRDS
Unnamed Location	Gemstone		Occurrence	MRDS
Unnamed Location	Stone, Crushed/Broken	Surface	Unknown	MRDS
Unnamed Location	Stone, Crushed/Broken	Surface	Unknown	MRDS
Unnamed Location	Mercury		Occurrence	MRDS
Unnamed Location	Stone		Occurrence	MRDS
Unnamed Quarry	Limestone, General	Surface	Past Producer	MRDS
Unnamed Quarry	Stone, Crushed/Broken	Surface	Past Producer	MRDS