The Impassable Rock is a manganese mine located in Mendocino county, California.
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.
Impassable Rock MRDS details
Site Name
Primary: Impassable Rock
Secondary: Rhodochrosite
Secondary: San Hedrin
Commodity
Primary: Manganese
Location
State: California
County: Mendocino
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: 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
Ore: Rhodochrosite
Comments
Comment (Geology): GEOL.DESC: 3 SMALL ORE BODIES; SMALL BLOCK OF HIGH GRADE SLIGHTLY OXIDIZED CARBONATE ORE FAULTED INTO PRESENT POSITION, AND TWO BODIES OF HEAVILY STAINED CHERT. RELATIONS ARE OBSCURED BY COMPLEX FAULTING AND GREENSTONE INTRUSION. ORE IS LIGHT GRAY CARBONATE CUT BY SMALL RHODOCHROSITE VEINS.
Comment (Location): LOCATED IN SW 1/4 SECTION 31 , NE 1/4 SECTION 6 , UTM APPROX
References
Reference (Deposit): D.O.M. BULL. 152 1950 P. 126
Reference (Deposit): D.O.M. BULL. 125 1943 P. 136
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.
