[2][3] The shape of the current valley was formed during the last glacial period, the Weichselian glaciation, which ended approximately 11,600 years ago.

Before that, there was already a valley in the same location, with a ground that consisted primarily of mica-rich quartz sand dating back to the Miocene.

However, in a few locations (near Vork and Vingsted), the ice stopped and began to retreat, leaving behind hilly terminal moraines.

[4][5] After the ice age, water continued eroding the valley, covering the floor with a layer of organic material.

Mussel shells have been found near Rosborg Gymnasium 3 km (1.9 mi) inland in this layer, suggesting that the fjord's water level used to be higher.

Each of these fish farms consisted of a network of small artificial ponds, further changing the river's hydrology.

The railroad operated from 1897 to 1957, and sections of the disused right-of-way have been converted into a rail trail known as Bindeballestien ("Bindeballe Path").