Here you can observe the deposition layers in sedimentary rocks of the Helvetic nappes. The stratification is caused by the different degrees of hardness of rocks resulting from their different mineral content. Softer rocks are eroded more quickly, which means that the harder layers stick out. The rocks consist of erosion material, flushed incessantly by the rivers into the primordial ocean Tethys and the remnants of the marine flora and fauna in the sea. Thus, with some luck, fossilized marine animals and plants can be found in the rocks. The stratification of the sediments is the reason for the visibility from far of the layers at the Bire, the Fisistöck or the Jegertosse.