Sandstone cliff. View of a sandstone cliff from which iron-rich limonite (orange,lower centre) is leaching out. The cliff is formed of sedimentary Lower Greensand rock. The sandstone layers were laid down in the Cretaceous period (136-64 million years ago). Limonite is essentially iron oxide. It is not used widely as iron ore for iron production,as it has a high concentration of phosphorus impurities. Photographed in the Isle of Wight,England | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stammers, Sinclair |
Taille de l’image : | 4953 px × 4075 px |
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