Fig. 6

Isopach line maps for the Early Cretaceous Schrattenkalk Formation (a) and Drusberg Member (b) based on thickness data from Heim et al. (1933), Briegel (1972), Zacher (1973), Felber and Wyssling (1979), Schwerd and Häussler (1983), Müller (1985), Oberhauser (1991, 1993), Schwerd et al. (1995), Funk et al. (2000), and Goldscheider (2002), indicated by blue points. Notice the opposite thickness changes of the platform deposits and the associated basin sediments which verify the interpolation. Thick black lines are outcrop limits of the Helvetic nappe system. Thin black lines show national borders