Fig. 5

3D seismic cross-section along the northern part of cross-section no. 7 published by Eugster et al. (1960) illustrating the excellent match of surface geology and 3D seismic data (see Fig. 4 for section trace). The shallow, NW dipping Molasse reflections are separated from the underlying triangle zone by the back thrust mapped as TDZ (Top Dreieckzone, i.e. “Randunterschiebung”). The borehole trajectory of SG GT-1 is projected onto the section plane over several hundreds of metres (600 m at well head, 1000 m at the bottom hole; compare with Fig. 4). The blue tick marks indicate the locations of the intersecting sections shown in Fig. 8c, d