Silurian

Period of geologic time approximately 444 to 416 million years ago. https://doi.org/10.3133/fs20103059
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Contributions to the gold metallogeny of northern Nevada

Nevada is one of the Earth's premier gold producing regions, accounting for approximately 64 percent of the U.S and nine percent of the world total. The impact of these mines on nearby local economies and on our national balance of payments is profound, a

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