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Auvergne - Les roches Tuilière et Sanadoire
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l’Auvergne n’est pas la région des volcans pour rien. Même si le Puy-de-Dôme est le plus connu, ces deux formations rocheuses qui se font face et sont à cheval sur deux communes, sont en fait un résultat de l’activité volcanique ayant eu lieu entre 2,2 et 1,8 millions d’année.
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