Cerro Galan volcano. Infrared satellite image of the Cerro Galan volcano (at upper centre left) in the Puna de Atacama, Argentina, part of the Andes mountain range. North is at top. In the infrared range bare ground and sparse vegetation is grey, dense vegetation is red, water is blue/black and snow is white. The volcano crater is partly filled with water. The ground has many grooves cut in it by the action of water in streams. The Andes range has formed over the last 20 million years and still contains active volcanoes. Image taken by the French SPOT-2 satellite in March.
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