Extensional reactivation of the Penninic frontal thrust 3 Myr ago as evidenced by U–Pb dating on calcite in fault zone cataclasite oleh A. Bilau, A. Bilau, Y. Rolland, Y. Rolland, S. Schwartz, N. Godeau, A. Guihou, P. Deschamps, B. Brigaud, A. Noret, T. Dumont, C. Gautheron