• 506782


    Caption: Weathering frees heavy minerals from their matrix, washing them down slope where flowing water forms them into placer deposits
    Artist:
    Release: None
    File Size: MB

  • 506700


    Caption: The rocker, or cradle, form of placer mining enabled one miner to handle more material than by simple panning
    Artist:
    Release: None
    File Size: MB

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