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History & Geology

Gold Depositiion and Gradients of Placer Streams—Part II

The steeper the gradient is, the more potential erosive power to move gold and other bedload sediments, and the more power to remove obstacles to flow.

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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.

The Tombstone Silver-Lead District, Arizona


In 1877, a prospector named Ed Schieffelin discovered silver in “the middle of nowhere” and staked two claims: “Tumbstone” and “Graveyard.” Soon a town and mining district were organized and acquired the name “Tombstone” after making a spelling correction.

Potholes and Other Bedrock Traps


Potholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.

California: The Land of Big Nuggets—Part II


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Prospecting With The Help of Fluvial Geomorphology


Quiz yourself about the stream in figure 5. Based on your previous knowledge of where gold is found in a stream and in this article, where do you think you will find the most gold?

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...the area around Eureka, Nevada is well mineralized and seems to have a bright potential for future production of all sorts of metals.

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The fresh material is worked and concentrated by the waves on the flat, wide beach platform. The waves wash away the lighter minerals, leaving the heavies near the bluffs and in depressions on the beach.

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