From the beginning of the Jurassic, Pangea started to break up. Many limestones and marls from Ardèche formed under seas of this perdiod. In front of the village, limestones deposits of Balazuc stand at close to 80 meters.
In the Ardèche, many places contain ammonites and other casts or imprints or mineralised hard parts.
At Vesseaux (North of Aubenas), a 3 meters long plesiosaurus have been found.
Near Lachapelle-sous-Aubenas, a marine crocodile have been extracted to the marls
