The Herbonne plateau

This plateau is representative of glaciofluvial terraces. They form a tabular promontory, bounded by vertical walls formed in the cemented glaciofluvial materials, at the foot of which the Le Rabioux mountain stream flows on one side and the Durance on the other. This glacial rock is a typical formation of the Haute-Durance valley, similar to the Roc d'Embrun or that of Mont-Dauphine. Its formation dates back to one of the last ice ages (100,000 years ago). At that time, the Durance glacier occupied the entire valley. Today, on its sedimentary rock base, the Roc is covered by vegetation which is highly characteristic of steppe grasslands.