Fig. 4

a Location map of the type-section of the Gorges de l’Orbe Formation at Montcherand (Vaud, Switzerland). Moncherand Member: b transition between the Grand Essert Formation (Neuchâtel Member) and the Gorges de l’Orbe Formation, c lowermost series of the Gorges de l’Orbe Formation with the Pont des Pierres and La Vaux beds; d focus on the glauconitic hardground at the top of the Pont des Pierres Bed; e Focus on the La Vaux Bed; f Cymatoceras pseudoelegans (d’Orbigny 1840) from the La Vaux Bed; g Bryozoan-rich muddy facies of the La Vaux Bed. Bôle Member: h view of the Bôle Member; i Discontinuity surface D.Ba2 at the transition between the Montcherand Member and the Russille Bed; j Oysters encrusting the discontinuity surface D.Ba2; k polished slab with corals from the TST of the uppermost marly intercalation of the Bôle Member; l muddy facies of the Bôle Member with corals and stromatoporoids