One of the most beautiful terroirs in the Languedoc, but also one of the least known. The slopes of rolled pebbles with a matrix of red ferruginous clays were formed 400,000 years ago during a geological phenomenon called “Alpine Diluvium”. At that time, the torrential flow of the Rhône River tore the rocks from the foothills of the Alps and rolled them into terraces near the Mediterranean Sea. Differential erosion today only reveals the hardest rocks: the silica-rich quartzites. The other softer rocks have been degraded to form the iron-rich clay matrix.