Fig. 3

Cross sections in the study area (see Fig. 2 for location and colour legend). a Eastern cross section 1: note fault-bounded block of Hauptdolomit left of the centre of the section, delimited by a normal fault, the thick Allgäu Fm. to the S, and, the shortcut thrusts labelled 1 and 2 to the north. b Western cross section 2 where the same fault block is cut near its western termination. Tight folding and thrusting affect a 1 km thick zone below the Lechtal thrust. A horizontal projection of the axial plane of the Birkental syncline parallel to the general strike of the Lechtal thrust demonstrates 900 m dextral offset between the two sections across the NW–SE striking segment of the Lechtal thrust. Abbreviations: ATS: Allgäu thrust sheet; LTS: Lechtal thrust sheet