California · Napa County
Occurrence
Blue Monday Claim
Napa County, California, United States
Manganese
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USGS source ↗
Commodities
Tertiary
Manganese
Commodity type
M
Economic & production
Development status
Occurrence
Discovery year
1916
Identification
Deposit ID
10189198
Alternate names
Surpise, Searchlight
Region
NA
Data score
D
Coordinates
38.73048, -122.32686
References
CALIF BULL 125 1943 P 145; BULL 152 1950 P 156-7ASSAYS MANGANESE 2.25% FERRIC OXIDE 18.81% AND SILICA 66.4%