The seas of the Tertiary era deposited sediments at the base of the limestone massif of Ventoux and, notably, on the territory of the current locality of Rustrel in the Vaucluse department. Under the typically Mediterranean garrigue, one distinguishes red earth originating from the degradation of limestone. Such aerial shot gives pride of place to the soils made up of mixtures of sands and ocher clays which take on all kinds of colors depending on the mineral oxides they contain.