A structurally rich ravine forest has developed on the slopes of the deeply incised valley of the Angstbecke stream. In the northern part of the nature reserve, extensive to unused wet grassland extends along the Sonnenborn stream valley. The slopes and hilltops are mainly covered with beech forests and occasional spruce forests. The structurally rich Buchenwalds and ravine forests as well as grassland areas are characteristic of the Rothaargebirge natural area in terms of their characteristics and species diversity. In order to preserve this valuable habitat, the ravine forests should be left to develop as undisturbed as possible.
Geology: In places, there are open rock areas in the nature reserve. The rocks are the dark gray "Fredeburger Schiefer" of the Asten layers and the dark gray clay and silt slates of the "Langewiese layers". The silt content is often increased, giving the slates a banded appearance.
age of the rocks : Asten layers: Eifel stage, Middle Devonian (about 390 million years before present)
Langewiese layers
: Eifel stage, Middle Devonian (about 391 million years before today)
