Iron-rich spring. Travertine deposits (orange) around a natural spring (far left). Travertine is formed as calcium carbonate is precipitated out of hot spring water when it emerges above ground and cools. It is deposited in successive layers,one on top of the other. Usually travertine is pale in colour,but here it has been coloured by high concentrations of mineral iron in the water. Photographed in Kirkjufell,a volcanic region in southern Iceland | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5016 px × 3512 px |
Model Release : | Non requis |
Property Release : | Non requis |
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