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Fig. 6 | Swiss Journal of Geosciences

Fig. 6

From: The St. Gallen Fault Zone: a long-lived, multiphase structure in the North Alpine Foreland Basin revealed by 3D seismic data

Fig. 6

a Non-linear depth column showing the well tops as derived from the litho-log of SG GT-1 and adjusted to the time-linear scale using the check shot corrected sonic log. Note that the seismic reference datum (SRD) is 400 m a.s.l. and that the well head (not indicated) is on 579 m a.s.l. b Velocity column shown as the inverse of the check-shot-corrected sonic log. The correction was only applied down to the Top Malm (TMa) horizon. c Density column showing densities inferred from sonic log (P-wave velocities) by the Gardner’s Law (Gardner et al. 1974). Density in SG GT-1 could only be measured in the Upper Jurassic Malm section. d Calculated, time-linear synthetic seismograms for Ricker wavelets with different central frequencies. e Extract of inline (IL) 250 with crosslines (XL) ranging from 301 to 291 centred around the penetration point of SG GT-1 at Top Malm. The TMa and BMa lines correspond to the seismic horizons as interpreted in this project. Note that the polarity of the seismic section has been reversed in this figure to match the synthetic seismograms

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