Mont Gerbier de Jonc, Saint-Martial

(70+ reviews on the web)
Mountain
Mont Gerbier de Jonc is a mountain of volcanic origin located in the Massif Central in France. It is made of a type of rock called phonolite. It rises to an altitude of 1551m, and its base contains three springs that are the source of the Loire, France's longest river. It is the second most-visited site in the département of Ardèche, after the Ardèche Gorges.Mont Gerbier de Jonc was formed 8 million years ago when a volcano erupted molten phonolite lava. The lava was too viscous to flow far and it cooled to form a lava dome of phonolite rock in the crater of the volcano. The lava dome has columnar jointing, which formed during cooling of the lava. The volcanic cone containing the lava dome was later eroded away, exposing the lava dome.
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Reviews
TripAdvisor
  • Rather intriguing, beautiful and wild. The mont gerbier is to be included in the visit of several sites of the Ardèche plateau... place unknown but which is full of wonders (cascade of Ray Pic, Lake Saint Martial...)
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  • Unique wonderful small craftsmen at the foot of Mount visit the shop with the source of the Loire produced local and regional memories a treat!
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  • At that time, everything is closed, so nothing to see if mount! And there also is quickly seen! Return and 1 h 30 ROUND-TRIP drive for it!
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