Production year
1999
© Marie-Françoise ANDRE/CNRS Images
Reference
20070001_0023
"Rhizocarpon geographicum". Thalles circulaires de lichens crustacés, ou encroûtants, colonisant un
"Rhizocarpon geographicum". Thalles circulaires de lichens crustacés, ou encroûtants, colonisant un bloc de basalte. La mesure systématique du diamètre de ces lichens permet de dater certains événements intervenus sur les versants comme les chutes de blocs, avalanches, "coulées de débris" ou debris flows. Sudureyri, Islande du nord-ouest.
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