History & Geology
Glaciers and Placer Gold Deposits
November 2016 by Chris Ralph

The Coolgardie Gold Mining Camp of Southern California
The area was mined intermittently from around 1900 to 1915, but was also mined in the late 1800s, with a total output valued at about $100,000, which is around $9.5 million at the current gold price.
Ask The Experts
Gold in clastic black shale
Using Favorable Rock Types to Find More Gold
The more experienced prospectors know these lesser known spots are the types of places where big finds are still made.
The Strange History of the Utica Mine

Eastern Arizona: Gold and Base Metal Deposits—Part I

The Golden Days of Julian, California
Some scattered reports say that gold may have been washed from streams here as early as the 1840s, but the undisputed major discovery came in 1870.
PGMs in the United States

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