NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Volcanoes, Chile, satellite image. Many volcanic peaks are dotted about this landscape, with the rock geology and age indicated by the variation in the colours. The volcanoes are currently dormant, but lie on top of, and created, a layer of igneous rock, about 3.5 kilometres thick, that covers this area. They lie on the Chile-Argentina border, next to Catamarca Province, Argentina. Image taken on 15 May 1999, in visible and infrared wavelengths, by the Enhanced Thematic Mapper Plus (ETM+) sensor aboard NASA's Landsat 7 satellite.
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