Unformatted text preview: People came from every country for gold rush, opportunity for prospect and keep gold 7) What new processes for extracting gold were developed in the 19th century Pulling gold from streams, geochemical process, gol found by gravity, Hydrolic mining, cyanide, 8) What percentage of all US gold came from the Homestake mine in the Black Hills of South Dakota? 10% 9) What makes the gold found in the Carlin trend of Nevada so unusual? It is so small and microscopc that u cant see the gold. 10)How much does an average doré bar weigh? 70lb...
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- Summer '03
- Black Hills, basin gold fields