Fig. 15

Local lithologic successions observed in the Mont Fort nappe and hypothetical Late Jurassic margin reconstruction. a Local lithologic successions observed in the Evolène Series and in the Mont Fort basement along their contact. The locations of the logs are given on Figs. 6, 7 and 9. The coordinates of their topographic bases and tops respectively are indicated below: L1 (tectonically overturned) [599′410/107′106] to [599′577/106′990]; L2 (tectonically overturned) [600′005/106′755] to [600′023/106′752], the picture of Fig. 12c is from the topographic upper part of the log; L3 [600′400/104′840] to [600′340/104′810]; L4 [600′250/106′720] to [600′070/106′700]; L5 [601′590/106′620] to [601′655/106′270]; L6 [595′355/101′940] to [595′370/101′930], the picture of Fig. 5b is from the middle part of the log; L7 [595′400/101′850] to [595′405/101′880], the picture of Fig. 11 corresponds to the main part of the log; L8 [595′600/102′040] to [595′535/102′065]; L9 [594′673/098′370] to [594′687/098′357], the base of the breccia is extremely rich in Métailler clasts (similar to the picture of Fig. 12d); L10 [594′520/097′630] to [594′460/097′760], modified after Gouffon and Burri (1997); L11 [594′112/097′742] to [594′122/097′745]; L12 [591′870/096′090] to [592′260/095′840]; L13 [592′905/095′960] to [593′005/096′035]; L14 [591′995/094′615] to [591′910/094′690]. b Reconstruction of the structure of the Mont Fort basement and Evolène Series at Late Jurassic Time. All the lithologic successions described in a can fit in this reconstruction, with a position in accordance with their current structural location. Relative thickness of the formations differs in a and b, due to highly heterogeneous Alpine deformation