Hydraulic Mining for Gold in California
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Paper Topic: Hydraulic Mining for Gold in California HYDROLIC MINING FOR GOLD IN CALIFORNIA The Origin of California ‘s Gold More gold was taken from the American River and its tributaries than all other rivers and streams of California combined Gold recovered from streams or rivers is called placer gold
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The majority of California ‘s placer gold was not mined from the present streambeds but was hydrauliced from the ancient (or Cenozoic ) riverbeds sometimes called the “auriferous gravels ” In fact , most of the gold found in the present streambeds actually came by way of these ancient gravels , where the modern streams eroded them away and reconcentrated their gold
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The climate during those ancient times had much more rain then at present and great rivers scoured through the earth The rivers carried the mountains to the sea and yet much of the gold those mountains remained trapped in those ancient riverbeds
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The modern rivers formed and cut new paths to the sea Whenever these canyon forming modern rivers cut through the ancient river gravels the gold they contained was released into the present rivers and concentrated anew ( HYPERLINK “http /www
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com \l “Lindgren ” Lindgren , 1911 California Gold Discoveries prior to 1948 Gold was not first discovered in California in 1848 , as is commonly believed
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The word placer originates from either a Spanish nautical term meaning “sandbank ” or a more common usage meaning “pleasure ” Both meanings seem to apply since it might be a much greater pleasure to extract gold from a placer sandbank then to crack it out of hard rock
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The Paleozoic seas once extended over the site of the present Sierra Nevada Mountains
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These spaces then became filled with veins or seams of gold bearing quartz
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Even Sir Frances Drake , who touched on California ‘s coast , in 1579 , said that gold was “occurring in abundance ( HYPERLINK “http /www
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Francisco Lopez was digging his knife after some wild onions on the great San Fernando Rancho , when he found what he thought to be gold clinging to the roots
