Fig. 1From: The Perte-du-Rhône Formation, a new Cretaceous (Aptian-Cenomanian) lithostratigraphic unit in the Jura mountains (France and Switzerland) a Geographical map of the Jura mountains (eastern France and western Switzerland) with the location of the studied sections. b Focus on the Bellegarde-sur-Valserine Basin and position of the main outcrops visible in the areaBack to article page