Nature of Söderåsen

How did Söderåsen come into being?

Legend has it that Söderåsen owes its existence to Alle the giant, a keen traveller. He wanted to visit Denmark, but in the age of the giants there was no Öresund bridge. So he had to build one himself. Carrying two sacks of gravel on his back, he started his journey towards the coast. But one of the sacks leaked and the gravel trickled out. And hey presto, Söderåsen appeared!

Of course the reality is somewhat different. Söderåsen is a horst, a ridge that formed when the bedrock around it subsided along fault lines around 150 million years ago. The fault arose when there was a collision between the Scandinavian plate and the European plate. The rift valleys that are so typical of Söderåsen were formed at the same time. The most common types of rock on Söderåsen are gneiss and granite gneiss. There are five to ten metres of soil cover, consisting mainly of sand and sandy heathland.

It was in the period after the big ice sheet had melted and the ridge was exposed to frost weathering that many of the dramatic and unique scree slopes and cliffs were formed. At that time, Sweden had a tundra climate, with permafrost, and there were rapid fluctuations between plus and minus temperatures.