Fig. 13

Major lithologic features of the Boëge Marl (a–d), of the Bruant Sandstone (d–f) and of the Fenalet Sandstone (g). a Clast-supported conglomerate of the basal layers of the Boëge Marl along the Torrent de Chauffemérande (46.1701° N, 6.3839° E). b Sandstone bed with current ripples from the Dranse outcrop (46.3594° N, 6.5207° E). c Small-scale fault-propagation fold along the Chez le Merizier stream (46.2237° N, 6.3991° E). d Chaotic structure along the stream at the Chez Musard (46.2234° N, 6.4136° E). This outcrop might correspond to the contact between the Boëge Marl and the Bruant Sandstone. The nature of the chaotic structure (fault or slump) is not resolved. e Exposure of the Bruant Sandstone along the Bruant stream displaying faulted block (46.2435° N, 6.43967° E). Note the different dip directions. f Marly interval in the Nant de Carraz (46.2297° N, 6.4162° E). g Tectonic contact between the Préalpes Médianes Nappe and the Voirons Nappe at the Fenalet quarry