Ochre quarry. Person holding large samples of earth at a yellow ochre quarry. Ochres are among the earliest pigments used by mankind. They can be various yellow,brown and reddish colours,and are derived from clay that is naturally tinted due to the presence of mineral oxides. Photographed in Gargas,France | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Psaila, Philippe |
Bildgröße: | 5125 px × 3411 px |
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