Fig. 8

Cyclostratigraphic correlation of borehole data in northern Switzerland. The datum used for correlation is the base of the Keuper. The thick red line corresponds to the maximum flooding surface of the 3rd-order transgressive–regressive sequence of the Upper Muschelkalk, based on the position of the Dünnlenberg bed in Benken after Pietsch et al. (2016). Correlations with Pfaffnau have not been attempted due to the lack of gamma-ray logs, the distance between boreholes and the 53 m of missing drill core