Its fascinating shape makes the Biberkopf (literally: beaver's head) one of the most striking mountains in the German Alps. Geologically the body of the summit is made of severely folded dolomite that was thrust up over marls. The very pure dolomite is the reason for the lack of vegetations on the mountain, because the content of clay minerals in the weathering products is insufficient for the formation of soil. By contrast, in the areas on marl strata there is a rich flora.