SEISMIC-REFLECTION PROFILING IN THE SWISS RHONE VALLEY .1. SEISMIC-REFLECTION FIELD WORK, SEISMIC PROCESSING AND SEISMIC RESULTS OF THE ROCHE-VOUVRY AND TURTMANN AND AGARN LINES

Seismic reflection surveying at several locations in the Rhone valley above Lake Geneva (Switzerland) reveals the bedrock form as eroded by glaciers in the Quaternary as well as some internal structures of the Quaternary sediments. Maximum sediment thickness near Lake Geneva is about 1 km, which is in drastic discrepancy to gravimetric investigations in this region which predicted about 420 m. In the region of Turtmann the sediment thickness is in the order of 400 m which agrees much better with the gravimetric model of 300 m. The usefulness of reflection seismology for solving small-scale problems and for high resolution surveys is discussed.