Karlby & Sangstrup Klinter appears as very beautiful coastal cliffs.
The bottom layer of the Danish Caldera, the Bryozo lime, reaches up to the surface here. Significant flint finds have been made from the Stone Age. There is an opportunity to find fossils.
Source: Bo Skaarup:
Karlby Klint is connected to the even higher Sangstrup Klint, separated only by a wide river valley, and you can walk along the water to both Gjerrild Klint and Sangstrup. But watch out for the water level! In high tide, the beach disappears in some places altogether, and finding a place to go up is not exactly easy.
Source: Geologist, nature guide Tove Stockmar
At Karlby Klint there are fossils everywhere. On the beach itself you can easily find petrified sea urchins between the large amounts of flint that have been washed together in an impressive beautiful beach rampart.
The flint stones (and the petrified sea urchins) come from the cliffs. By
high tide reaches the sea up to the cliff. Then it worn as quietly and there
gnawed material away in the rivet foot. This creates an overhang that falls down over time. The flint that previously sat in the cliff is polished beautifully round. It happens when the waves roll the flint into the sea, so the tubers bump against each other. Finally, the flint stones are placed on the beach in beautiful walls.