Fig. 1

Location and geologic maps of study area: a red patterned areas represent external massifs. AG Aar-Gothard massif, B Belledonne massif, AF Alpine thrust front, PF Penninic thrust front; b generalized geologic map of the Aiguilles Rouge and Mont Blanc massifs (modified from von Raumer et al. 1999). Also shown are the Late Carboniferous samples, located within the Salvan‐Dorénaz basin; c outcrop and sample map of Vieux Emosson Formation (black) in the Lake Emosson area (from Collet et al. 1951); d Paleocurrent rose diagram (equal area) of trough cross bed indicators taken from bedding plane exposures (e.g., Figure 2a) in the Lake Emosson area