Placer deposit mining

Extraction of minerals, typically metal ores, from unconsolidated surficial materials such as stream sediments.
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Generalized Surficial Geologic Map of the Pueblo 1° x 2° Quadrangle, Colorado

Fifty-three types of surficial geologic deposits and residual materials of Quaternary age are described in a pamphlet and located on a map of the greater Pueblo area, in part of the Front Range, in the Wet and Sangre de Cristo Mountains, and on the plains

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