19th Century hydraulic gold mining. This method of mining uses high-pressure jets of water to dislodge rock material or move sediment. Here it is used as part of the placer mining process,where the resulting water-sediment mix is directed through sluice boxes (not seent) to remove the gold. Photographed near Dutch Flat,California,USA,in 1868 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Library of Congress |
Bildgröße: | 3768 px × 2835 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |