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Map Lichen (Rhizocarpon geographicum), Setesdalheia, Norway

Map Lichen (Rhizocarpon geographicum), Setesdalheia, Norway

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Uploaded 03 Jun 2012 by Peter Prokosch
Year: 2012
From collection: Arctic Biodiversity
Taken by: Peter Prokosch
The map lichen 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. These patches grow adjacent to each other, leading to the appearance of a map or a patchwork field. 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. Lichenometry is based on t ...
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