A glacier transports morainic material at its underside. The rock fragments are crushed by the ice movement and the edges grinded. The moving glacier also polishes the ground - as if you were working wood with sandpaper. This is how the grinded rocks with glacier scratches and rock outcrops are formed. These rock forms rise smoothly on the windward side and fall steeply on the leeward side. The flow of the ice can be determined based on the glacier scratches on the rocks.