Geological map and section of the Col d'Urdach area. Note the structural position of the lherzolite slice within the Cretaceous flysch and Urdach breccias. 1: alluvial deposits; 2: Lower Senonian flysch; 3: Osquich Pass megaturbidite (Turono-Coniacian boundary); 4: Upper Cenomanian and Turonian carbonate flysch; 5: Vraconian-Early Cenomanian Flysch Noir; 6: Olistolite-bearing Urdach breccias (p: Palaeozoic; J: Jurassic; n: Early Cretaceous); 7: Early Albian black marls; 8: Upper Aptian limestones; 9: Lower Aptian marls; 10: Barremian and Jurassic limestones; 11: Palaeozoic; 12: gneiss; 13: lherzolite.