Limestone tufas. View across Mono Lake,California,showing large tufa formations. A tufa is a column or block of soft limestone,which here grow to about 14 metres high. It is formed by the stone (calcium carbonate) being deposited from solution at a geothermal spring or by the evaporation of circulating water. Mono Lake is a salt lake which is slowly drying. Although it has no outflow,the water feeding the lake is being diverted at an increasing rate. This puts a great stress on the lake's ecosystem,particularly migrating waterfowl | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fraser, Simon |
Taille de l’image : | 5214 px × 3470 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |