Gold in placer. Placer mining is a type of open cast mining in which minerals are extracted from alluvial,rather than from subterranean,deposits | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Svensson, Kaj R. |
Bildgröße: | 3488 px × 4650 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |