La Voulte-sur-Rhône is a commune in the Ardèche department in southern France. La Voulte-sur-Rhône is a marine Lagerstätte located in France. It is Middle Jurassic (Callovian) in age, and is known for the variety of fossils it produces, including cephalopods, such as Proteroctopus ribeti, Rhomboteuthis lehmani, and Vampyronassa rhodanica.