MDA INFORMATION SYSTEMS / SCIENCE PHOTO LIBRARY MDA INFORMATION SYSTEMS / SCIENCE PHOTO LIBRARY
Appalachian mountain folding. Coloured satellite image showing complex bands of folding in the Appalachian Mountains, north-east USA. The deep red colour of the folds indicates dense forest vegetation, whilst the pale blue in much of the rest of the frame denotes mixed agricultural land. The Appalachian range was formed by the folding of sedimentary rocks in the Palaeozoic Era about 400- 500 million years ago. Subsequent differential erosion of the various sediments present has emphasised the topography of the Appalachians. The data for this image were gathered by a Landsat satellite.
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