Fig. 1

Simplified structural map of the Jura Mountains based on the BRGM geological map. City locations and structural regions are represented by white and black letters, respectively (Bsl Basel, B Besançon, Ch Champagnole, Ge Geneva, HL Hautevillle-Lompnes, L Lons-le-Saunier, Mb Montbéliard, Mz Morez, M Mouthe, Ne Neuchatel, P Pontarlier, SC Saint-Claude, SH Saint-Hippolyte, Su Saint-Ursanne; Sm Serre massif, BR Besançon Range, LR Lons Range, QR Quingey Range, SR Salins Range, SS Sorne Syncline, Vf Vuache fault). Inset shows location of the study area within western Europe