The glacier, which flows downwards from the Jungfrau, acts brutally, especially in its center. Its enormous weight properly mills a wide nut into the landscape. Vertical, several hundred-meter-high rock walls bound a flat valley floor on both sides. From the V-shape becomes a U-shape, from the "Kerbtal" a "Trogtal".
The force of the ice stream at its edges is significantly lower. There are terrasse-like, gently inclined plateaus, so-called "Trogschultern", and often also "Hohlkehlen", which mark the peak of the glacier. The mountains rise steeply again.