New data from the Rhône Messinian Erosional Surface far in the hinterland. a, Google Earth view in the southern Jura Mountains area (see Fig. 1). The Messinian paleovalley is tagged by blue arrows. 1, Borehole Z1 in the Air Base 278; 2, Château-Gaillard Quarry; 3, Cormoz 1 borehole; 4, Location of the seismic profile 14 from the 16-0184 survey. b, Transverse view of the Cluse des Hôpitaux. The Messinian erosion should correspond to the uppermost 30-40 metres of the uplifted Jurassic cliffs. c, Aerial view of the outlet of the Cluse des Hôpitaux. Legend: see Fig. a. d, Section of the Château-Gaillard Quarry. e, Uninterpreted seismic profile 14. f, Interpreted seismic profile 14. Red line: Messinian Erosional Surface (MES). Photographs: b by J.-P. Suc; c by B. Chirol; d by P. Sorrel.

Données nouvelles sur la Surface d’érosion messinienne du Rhône loin à l’intérieur des terres.