US GEOLOGICAL SURVEY / SCIENCE PHOTO LIBRARY US GEOLOGICAL SURVEY / SCIENCE PHOTO LIBRARY
Byrd Glacier, satellite image. The Byrd Glacier in Antarctic moves through the Transantarctic Mountains at a rate of 0.8 kilometres per year. More than 180 kilometres long, the glacier flows down from the polar plateau (left) to the Ross Ice Shelf (right). Long, sweeping flow lines are crossed in places by much shorter lines, which are deep cracks in the ice called crevasses. The red patches are areas of exposed rock. Image data obtained by the Landsat 7 satellite on 11 January 2000.
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