Portal of the German Bar mine, Nevada County, California. circa. 1967.
Dates
Date Taken
1967
Summary
Album caption: Portal of the German Bar mine, located between Snow point and the Middle Yuba River, Slate and greenstone of the Calaveras Formation are intruded by gold-bearing(?) quartz, a rock type common in prevolcanic gravel, and the source for much of the gold contained in gravel. Nevada County, California. circa. 1967. Published as figure 3 in U. S. Geological Survey. Professional paper 772. 1974.
Summary
Album caption: Portal of the German Bar mine, located between Snow point and the Middle Yuba River, Slate and greenstone of the Calaveras Formation are intruded by gold-bearing(?) quartz, a rock type common in prevolcanic gravel, and the source for much of the gold contained in gravel. Nevada County, California. circa. 1967.
Published as figure 3 in U. S. Geological Survey. Professional paper 772. 1974.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Yeend, Warren E. Collection
Rights
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