Characteristic of the Lower and Middle Bunter are V-shaped valleys, with narrow floors and steep sides, cutting deeply into the bedrock. They are the typiscal valley forms in the central Palatinate Forest, whilst in the southern and northern parts, U-shaped valleys with wider floors predominate. In the southwestern part of the Forest are the so-called "woog" valleys, in which the valley floor is wide and they are therefore especially well suited for the construction of ponds, or "woogs", reservoirs and small lakes (see below).