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The Lost Silver Triangle of the Sierra Madre—Part I

The North American continent harbors a vast mountain fastness that few Anglo-Americans have seen—an awesome land cut by perpendicular canyons and towering peaks, a forbidding wilderness virtually unchanged...

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What Are Those Rocks In My Pan?


The placer mineral identification key is designed to answer this question. It attempts to recognize all the minerals in your gold pan concentrates.

Mining Stock Quotes and Mineral & Metal Prices


Legacy of the Wandering Jew Mine


The Tyndall Mining District of Santa Cruz County contains the oldest mines in the state of Arizona. Described as the most celebrated mineral region in North America, its ancient mines have produced a phenomenal amount of rich masses of pure native silver and ore prior to the arrival of the early Spaniards extending into the present century.

The Bawl Mill


• Pennsylvanians looking for a tax rebate get a sultry offer
• Teenage legislative employee alreadys knows how to spend taxpayer money

Carbonatites


Carbonatites are rocks that formed from molten calcite or dolomite. The thought of calcite being molten lava is difficult to accept, but it was confirmed when it poured out of a vent in Tanzania in 1960.

Precious Metals in the Patagonia Mountains


The Patagonia Mountains are a small but rugged mountain range that adjoins the Mexican border some 9 to 16 miles east of the border town of Nogales. The range trends northerly for 14 miles and is about 10 miles wide, reaching an elevation...

Continuing Hard Rock Exploration


We had been picking away at it, but the going was mightly slow. Why not use some explosives to advance a little quicker?

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