The Wimbach valley is characterized by huge debris flows, which is why the upper part of the valley is also called Wimbachgries. At the top of the valley, they are a good 1.5 km wide. The weathering material pulls down from the area of the Palfelhörner. The rubble is constantly in motion under the influence of gravity, but hardly ever noticeably. After heavy rain, larger material loads can be observed.
The Wimbachtal drains via the eponymous Wimbach. In the upper valley, the huge debris flows determine the picture. Here tributaries arise above ground, but then seep into the loose material in which they unite underground. In dry weather, the stream rises at about 800 m above sea level. NN in several sources close together from the rubble, less than three kilometers from the mouth. An enclosed side spring provides water for a large part of the population in the south of the Berchtesgadener Land. In the lower section the Wimbach runs through the short but worth seeing Wimbachklamm. A few hundred meters after leaving it, it flows into the Ramsauer Ache opposite Ramsau-Hirschpoint from the right.
During the Ice Ages, glaciers carved out and deepened the valley. The bed of the rock is now more than 300 meters below the surface of the debris flows that fill the valley floor. Before it was graveled, the Wimbachgries was probably filled with a lake. In contrast to the Königssee on the other side of the Watzmann, which is surrounded by firmer Dachstein limestone, the Ramsaudolomit in the area of the Wimbach valley offered less resistance to erosion.
Source: Wikipedia