Hiking - Trail of the three rocks

Dive into the green ocean to discover the sandstone rocks around La Petite-Pierre!

The geological movements of the deformation of the Vosges caused the separation of whole sandstone compartments, creating faults and diaclases, zones of weakness in which the water of infiltration infiltrates, which enlarges these cracks and causes the detachment of whole sections of rocks that run down the slopes. The sandstone compartments remaining in place form beautiful ruiniform pitons with vertical or overhanging walls with a slab of conglomerates at their summits.