There are shallow valleys in the slopes of Romeleåsen. Usually there's a small stream or creek in the bottom. In an industrial agriculture area it is often little more than a ditch. Once upon the time when the earth's crust was much younger there might have been a river here.
This slope is part to what the Tornquist fault. which is the geological border between Scandinavia and Central Europe. Along this fault there are interesting geological formations. Dead volcanoes, horsts and whatever. And just a few years ago we were reminded of the fact that although Tornquist is dead, his zone isn't. Tornquist arranged an earth quake that was visible on the Richter scale. It's epicenter was not far from where these photos were taken.