Lomborg - Bonnet - Heldum

The site lies immediately north of the Main Stationary Line, which indicates the extent of the Main Thrust at the end of the last ice age, as described in the Lomborg site.

 

The Lomborg – Bonnet – Heldum area is a fine example of a small hilly and pitted dead ice landscape formed on a moraine surface during glacial melt, and with a marginal moraine formed during a rethrust. The moraine landscape immediately behind the Main Stationary Line at Lomborg – Bonnet – Heldum is small hilly with uneven small depressions and hilltops with a relief of 5-10 meters.

 

The distance between the depressions varies, but is typically between 100 and 500 meters. For example, in the southwestern corner of the area, five small water-filled depressions are seen within a distance of just 500 meters. The soil is predominantly moraine clay, while in the eastern part, especially, there are small areas of meltwater sand and meltwater clay. Today, many of the small depressions are dry, which is largely due to man-made drainage for agricultural purposes.

 

Older maps show that many of the depressions were previously filled with water, which is also evident from the fact that peat is often found at the bottom of these depressions. The peat is formed in a small bog with plant growth.