The Upper Stalden Nappe is a Middle Penninic tectonic unit of the upper Valais region, between Visp and the Simplonpass, with a similar in structural position as that of the Ruitor Nappe (between the Zone Houillère and the Siviez-Mischabel Nappe). It is composed of a polycyclic basement with numerous pre-Alpine relics, seemingly lacking a sedimentary cover.

Feinkörniger grauer Paragneis (Metaquarzit und Metagrauwacke) der Obere Stalden-Zone, mit Horizonte reich an Kerogen.