The Auriferous Gravels of the Sierra Nevada of California, Volume 6, Issue 1 |
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Excellent reading, great for research, if one likes the subject. I do.
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The Auriferous Gravels of the Sierra Nevada of California, Volume 2 Josiah Dwight Whitney No preview available - 1880 |
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already altitude American amount appears auriferous average bank bed-rock blue boulders California Cañon capping cement channel character City claim clay connection considerable contains continuous County course covered Creek deep deposits depth direction distance east entirely evidence examination existence extends fact farther feet Flat flow Fork formation geological given gold granite gravel ground half head height higher Hill hundred feet hydraulic inches known lava least less localities lower mass material matter Michigan Middle miles miners mining Mountain mouth nearly Nevada observations obtained occur origin portion position present probably Quaker quantity quartz question range Ravine reached reference regard region remains ridge River road rock seems seen shaft side Sierra slate slope stream surface taken thickness tunnel upper Valley vicinity volcanic washed whole yield Yuba