860-288801 - Clay loaded with iron oxides and dried out, Rio Tinto, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
860-288800 - R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
860-288799 - R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
832-384331 - Abstract detail, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384329 - Abstract detail, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384347 - Shield Grand Prismatic Spring in front of yellow mineral deposits, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384346 - Wave structure, coloured mineral deposits at the edge of the hot steaming spring, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384334 - Steaming geysers, hot springs, colorful mineral deposits in the Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384344 - Colored mineral deposits at the edge sr steaming hot spring, detail photo, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384333 - Sinter terraces, hot springs, orange mineral deposits, Palette Springs, Upper Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America
832-384323 - Detail photo, hot spring with orange mineral deposits and algae, Palette Springs, Upper Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America
832-384317 - Young woman photographed, dead trees at Opalescent Pool with mineral deposits, Black Sand Basin, Yellowstone National Park, Wyoming, USA, North America
832-384326 - Sinter terraces with calcareous tuff deposits, hot springs, colorful mineral deposits, Palette Springs, Lower Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America
832-384328 - Abstract detail, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384332 - Abstract detail, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384350 - Visitors on footbridge over steaming hot spring with coloured mineral deposits, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384330 - Abstract detail, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384327 - Abstract detail, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384325 - Dead trees on sinter terraces, hot springs, orange mineral deposits, Palette Springs, Upper Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America
832-384324 - Sinter terraces with calcareous tuff deposits, hot springs, colorful mineral deposits, Palette Springs, Lower Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America
832-384343 - Visitors on footbridge over steaming hot spring with coloured mineral deposits, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-387613 - Puente del Inca, rock arch and old thermal bath of the sulphur spring above the Rio de las Cuevas, near Uspallata, Mendoza Province, Argentina, South America
832-384335 - Steaming geyser, hot springs, colorful mineral deposits in Porcelain Basin, Noris Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
1116-48836 - Colourful layers of minerals are exposed at John Day Fossil Beds National Monument. No grass grows on the Painted Hills Unit, Mitchell, Oregon, United States of America
857-95805 - A blue coloured boiling hot mud pool emanates steam as the sunset colours the sky orange, in Hverarâândor Hverir Geothermal Area at Namaskard Pass, North Iceland.
832-382629 - Solfataras, fumaroles, mud pots, sulfur and other minerals, a woman on the viewing platform at the back, high-temperature geothermal area or Hverarond or Hverir, Namafjall mountains, Myvatn area, Norourland eystra, Iceland, Europe