Evidence of the Permian (300 – 251 Ma) can be found along the left side of the Val Rendena. There emerge effusive magmatic rocks, commonly called Porphyry (Lava di Bocenago, Ignimbriti di Malga Plan) and terrestrial sedimentary rocks (Arenarie di Val Gardena / Verrucano Lombardo). Magmatic units indicate the presence of eruptive centers (such as volcanoes). Their products accumulated in a depressed area (Tione Basin). The terrestrial sedimentary rocks are instead the product of erosion and fluvial transport operated by the atmospheric agents on the Porphyry and on the crystalline basement, the only lithologies emerging at the time.