White Rock magnesite mine, Pope Valley. Napa County, California. 1917.
Dates
Date Taken
1917
Summary
White Rock magnesite mine, Pope Valley. Open cut and winze on west vein and tunnel through to Folatti vein. Shows small magnesite veins in serpentine hanging wall. Napa County, California. 1917.
Summary
White Rock magnesite mine, Pope Valley. Open cut and winze on west vein and tunnel through to Folatti vein. Shows small magnesite veins in serpentine hanging wall. Napa County, California. 1917.
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