Mont Gerbier de Jonc
 |
| Gerbier de Jonc | |
|---|---|
.JPG) | |
| Highest point | |
| Elevation | 1,551 m (5,089 ft) |
| Geography | |
| Parent range | Massif Central |
| Geology | |
| Mountain type(s) | 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.[citation needed]
This particular Lava dome resembles the back of a mythical tarasque.[citation needed] When it was active, it would have smelled of rotten eggs due to Hydrogen sulfide gas emanating from vents and fissures surrounding it.