L’Arzon prend sa source à 1100 mètres d’altitude, au pied du suc de l’Aire dans les monts du Livradois ou semblerait il plus dans les monts du Forez.
Il se fraye un chemin jusqu’à la Loire au travers du granite, composant des paysages escarpés et sauvages. La diversité des reliefs a créé dans les gorges de l’Arzon les conditions d’une biodiversité exceptionnelle, préservée par la difficulté d’accéder au site.
Je remercie Elisabeth Susin qui m'a autorisé à prendre ses photos pour illustrer mon article.
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