The rocks that make up the Jura were formed during the Jurassic period and contain traces of dinosaurs and are rich in fossils. In the vicinity of Courtedoux, 1500 dinosaur footprints were discovered between 2002 and 2004, and it is estimated that about 4000 more are waiting to be discovered. The highest peak of this range is Cret de la Neige in France (1720 m above sea level), and in Switzerland - Mont Tendre (1679 m above sea level).
