A glacial rock bar, who has a pickaxe?

Go past the 50 m barrier and turn around. Ÿou will be amazed to see a glacial rock bar of quartzite (polished green-white stones) blocking the valley. In two million years of exertion, the valley’s glacier has eroded the surrounding rocks. As the quartzite is much more resistant and compact than the schist (black in colour), the glacier has polished them, thereby preventing the valley from continuing to collapse. This type of valley is called a “hanging valley”.