Limestone tufas. Fisheye view of Mono Lake,California,USA,showing large tufa limestone formations. Tufas are columns or blocks of soft limestone,which here grow to a height of about 14 metres. They are formed by 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 wildlife,particularly migrating waterfowl | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Nunuk, David |
Taille de l’image : | 5102 px × 3507 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |