Map lichen in Austria mountains, Tyrol
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  • Photo title: Map lichen in Austria mountains, Tyrol
  • Author: 2circles
  • Cover photo description:
  • Map lichen upon boulders along the Zamser Bach, mountain stream in the Tyroler Zillertal Alps in Austria. The map lichen or Rhizocarpon geographicum is a species of lichen, which grows on rocks in mountainous areas of low air pollution. Each lichen is a flat patch bordered by a black line of spores. Map lichen is a lichen widely used by climatologists in determining the relative age of deposits, e.g. moraine systems, thus revealing evidence of glacial advances. The process is termed lichenometry.
  • Image ID:35225597
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