Today, the only accessible outcrops are abandoned gypsum quarries: Riepel south of the Bänkerjoch Pass and Stäglimatt south of the Staffelegg Pass (both located in the municipality of Küttigen AG), as well as a quarry in Oberehrendingen AG at the northern flank of the Lägern ran...
The lowermost unit V is apparently missing, as well as the markerbed 1 expected in the uppermost unit I. For those reasons, the Riepel quarry was chosen as the type locality (Fig. 3), whereas the name of the formation derives from the nearby Ba¨nkerjoch road pass. The corresponding ...