Mont Gerbier de Jonc
| Gerbier de Jonc | |
|---|---|
.JPG) | |
| Elevation | 1,551 m (5,089 ft) |
| Location | |
  Gerbier de Jonc | |
| Range | Massif Central |
| Coordinates | 44°50′40″N 4°13′12″E / 44.84444°N 4.22000°ECoordinates: 44°50′40″N 4°13′12″E / 44.84444°N 4.22000°E |
| Geology | |
| Type |
Lava dome Phonolite |
Mont Gerbier de Jonc is a mountain of volcanic (phonolitic) origin located in the Massif Central in France. It rises to an altitude of 1,551 m (5,089 ft), 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.
This particular Lava dome resembles the back of a mythical tarasque. When it was active, it would have smelled of rotten eggs due to Hydrogen sulfide gas emanating from vents and fissures surrounding it.