This hilly area is interpreted as representing a terminal moraine formed by a re-advance following the Main Weichselian Advance. The gently undulating, hilly topography and the many small valleys make it difficult to decide whether the area represents a terminal moraine formed in front of a lobe-shaped advance from the ENE, or whether it represents a NW-SE ridge that is in line with the terminal moraine at Toftum Bjerge (site 6). In the latter case the ridge was formed in connection with a glacial advance from the northeast. The sandy area southwest of the hilly portion is interpreted as being a small outwash plain deposited in front of the terminal moraine by meltwater from the glacial re-advance that formed the moraine (Figure 9-2). Venø Sound is considered to represent a source depression associated with the Breinholt arch glacial re-advance i.e. the combined terminal moraine and source depression represent a hill-hole pair. This small area therefore contains a complete glacial series with a source depression, a terminal moraine and an outwash plain.
In addition to the unquestionable aesthetic quality of the landscape down to the coast, this site has excellent educational values because of its small size and its relationship to the sandy outwash plain. This plain stands out in the landscape because of its flat topography and sandy nature. It is located adjacent to a depression in the moraine ridge that may be a result of the outflow of meltwater. Towards Venø Bay there is a prehistoric coastal cliff and a small area with postglacial deposits. A small cliff profile in the extreme northern part of the site exposes a massive, grey, stony till that is overlain by meltwater sand. The area is protected under Nature Conservancy Law § 3 (protected types of nature) and the coastal protection zone. An area around Humlum church and the prehistoric barrows are conserved.
