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History & Geology

Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits

Geology is a science of general tendencies with frequent exceptions, not one of hard and fast rules that are always true and never vary. For almost every well-accepted rule of gold deposits, I can point you to a number of important exceptions.

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Rare Silver Nuggets And Their Origins


Silver nuggets have been described as “ultra-rare,” “prized” and “unique.” Naturally occurring silver nuggets are rare enough to suggest caution when purchasing. Fakes have reportedly been produced and misrepresented for sale as genuine specimens.

Copper Deposits of Alaska


Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.

The Long Road to Gold Point, Nevada


Apart from the hard rock mines, there are abundant gold-bearing placers, especially in the areas in and around Oriental Wash.

WSGS Releases New Geologic Maps


The Wyoming State Geological Survey announced ten new geologic maps have been completed and are now available.

Eastern Arizona: Gold and Base Metal Deposits Part II


In this review of precious and base metal deposits in Arizona, it is apparent that several significant mines and mineral deposits occur in eastern Arizona, and there is considerable potential for new discoveries.

Understanding and Prospecting Benches


The most obvious benches are usually near the valley floor, but they can be thousands of feet above the valley floor. Since benches were made by streams, they can contain placer deposits.

The Rush to Treasure Hill


There were some exceptional times in the far-flung history of the West. Rich finds of minerals that set men’s souls ablaze. From the rich gold fields of California, men who arrived too late to find riches went searching in every direction. The trail that we will follow leads east, past the shining silver district of the Comstock Lode.

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The Bawl Mill   • Ask The Experts: What is a Spanish needle?   • Ask The Experts: Sulfides and fluxes   • Legislative and Regulatory Update   • The "Madonna Nugget"—A Weekend Hunt to Remember   • The Goldfield Mining District, Nevada—Part II   • Sunset Sunbaker   • A Prospecting Adventure in Mexico   • Critical Minerals: Tungsten   • Police Urge Author to End Treasure Hunt   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

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