Puy Griou, Volcanic peak in Cantal, France
Puy Griou is a volcanic peak with a distinct pyramidal shape that stands out sharply in the Cantal landscape. Its slopes are covered in extensive scree fields that give the mountain its rough, angular character.
Scientists once thought it was an eroded volcanic pipe, but geology revealed it actually formed as a phonolite dome around 6 million years ago. This finding reshaped understanding of how volcanoes developed in this part of France.
The mountain's name comes from an Occitan word meaning rugged or difficult, reflecting how locals understood the climb. This linguistic heritage connects visitors to centuries of mountain culture in the region.
The climb starts from Super Lioran station using established hiking paths that require moderate fitness. Visit during warmer months when snow and ice do not block the routes.
Repeated freeze-thaw cycles during the Quaternary period shattered the volcanic rock into sharp-edged blocks, creating the scree slopes visible today. This physical weathering shaped the mountain's rough, fractured appearance.
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