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Lluvia de Oro— A Shower of Gold Awaiting Development in the Sierra Madre—Part I

In the silver belt of the Sierra Madre, the Lluvia de Oro was a discovery of gold, found not by the Spaniards of yore, but from an observant Indian a little over a century ago.

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Surviving The Boom and Bust Cycle


Back when I was in college, when I first started classes, the demand for new engineers was so strong that every graduate had multiple job offers without even trying.

Revisiting the Rocker Box


The first location we worked was a small, dry ravine cutting through many mineralized zones in an area where some hard rock mining had taken place in the past.

Enrichment of Mineral Deposits by Weathering—Part II


While both zinc and lead deposits also are enriched by the surface weathering process, in part two we will look at the enrichment process for copper and also gold deposits, and at the interpretation of leached outcrops to figure how rich the concentrated deposits below them may be.

Mining Stock Quotes and Mineral & Metal Prices


Melman on Gold & Silver


World stock markets recovered from the brink of catastrophe to post sterling performances, based in large part on a one-half percent reduction in the Fed Funds rate enacted by the Federal Reserve Board.

Mariposa, California


The sleepy town of Mariposa, known more today as one of the gateways to Yosemite National Park, was once considered the southern end of the famed “Mother Lode” gold deposits that stretched hundreds of miles throughout California’s Sierra...

Washington Gold & Fish Regulations Update


The Washington Department of Fish & Wildlife (WDFW) announced the release of their new small-scale mining regulations. Public meetings were scheduled at several locations in the state to collect comments, but we learned just prior to press time that the process has come to a halt.

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