Fig. 6

Field photos of selected outcrops showing the lithological characteristics of the formations. A Klus Fm. B Valzeina Fm. C folded and kinked Sassauna Fm. D Coarse Sassauna Fm. showing the so-called “Tüpfelschiefer”. E Regularly bedded Pfävigrat Fm. F Fadura Fm. G thick-bedded Gyrenspitz Fm. with upward younging. H intensely folded Eggberg Fm. also showing pencil structures. I subvertically bedded Oberälpli Fm. in the Chrützböden locality, from which most of the new biostratigraphic results of the formation were obtained. J massive Ruchberg Fm. sandstone unconformably overlying Pfävigrat Fm. sandstone. K classical outcrop of the Ruchberg Fm. in the northern flank of the Ruchberg. L laminated thin-bedded (distal) Ruchberg Fm. in the Chläsi locality. M variegated marls probably overlying the Egberg Fm, nannoplankton results indicate a Maastrichtian or younger age (written comm. Eric de Kaenel 2020)