Volcanic columns
Usson
While heading the summit, you can see basalt columns : lava cooling down took the shape of pipes of organs, just like hexagonal columns.
These columns are of volcanic origin : they are lava which, when cooled, took the form of organ pipes, like hexagonal columns. This angular rock was used to build the castle and then the village houses.
These columns are of volcanic origin : they are lava which, when cooled, took the form of organ pipes, like hexagonal columns. This angular rock was used to build the castle and then the village houses.
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Photo credits : N. Dutranoy Pays d’Art et d’Histoire, N. Dutranoy Pays d’Art et d’Histoire, N. Dutranoy Pays d’Art et d’Histoire, N. Dutranoy Pays d’Art et d’Histoire, N. Dutranoy Pays d’Art et d’Histoire
Updated on 4 July 2025 by Auvergne Pays d’Issoire