Fig. 1

Palaeontological dating of the “Pierre Jaune de Neuchâtel” and Urgonian limestones (“Urgonien Jaune” and “Urgonien Blanc”) in the Swiss and French Jura. The column to the left with the formation names and erosional profile is after Godet et al. (2010, 2011) the adjacent column shows the biostratigraphical interpretation of Godet et al. (2011). The column on the extreme right shows our biostratigraphical interpretation, based on the nine fossil groups shown in between. All the fossils above the “Marnes d’Uttins” are Late Hauterivian or younger in age, including all long-ranging taxa, the last occurrence of which is Hauterivian. The palaeontological data base is as follows: ammonites (Mouty 1966; Busnardo and Thieuloy in Remane et al. 1989; Clavel et al. 2007); echinids (Clavel in Remane et al. 1989); orbitolinids (Clavel et al. 1987, 2007, 2010 and references therein); dasycladalean algae (Conrad and Masse in Remane et al. 1989; Clavel et al. 2007, 2010 and references therein); dinocysts (R. Jan du Chêne in Clavel et al. 2007; P. Hochuli in Godet 2006); nannofossils (S. Gardin and E. Erba in Godet 2006); rudists (Masse 1976, 1995; Masse et al. 1998, in Remane et al. 1989, 1998); calpionellids (Granier et al. 1995); bryozoans (Walter 1993)