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Samuel Franklin Hunt Nevada’s “Rio Tinto”

At the well-known Rio Tinto copper district, Huelva, in southwestern Spain, large quantities of copper were found beneath a gossan of hematite at an average depth of 100 feet. The deposits were first mined during Roman times.

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Excerpts from California Mining Journal, our original title, published 50 years ago this month.

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Ask the Experts


Can I treat a sample with muriatic acid?

Melman on Gold & Silver


The combination of these two concerns—the drift toward socialism and the willingness to violate law—appear to me to be capable of raising the level of civil disorder to a point where such disorders could be positive influences on the price of gold and silver.

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This sampling program was painfully tedious, and I’ve still got the calluses and embedded shovel splinters to prove it. But completing that testing program validated certain areas of the creek and eliminated others.

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