A small group of Calamites on a muddy river
bank in the Carboniferous. These giant 'horsetails' could reach a height of 15
meters or more. In the background to the right towers a Sigillaria,
around 30 meters tall. Image rendered with the 'Povray' software.
Illustrator: Øyvind Hammer
Copyright: Coquina Press, 22 June 2001
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