[2] The fiskeler is enriched in iridium, a fact used as an argument for the Alvarez hypothesis that the worldwide Cretaceous–Paleogene mass extinction was caused by the impact of an asteroid.

[7] Stevns Klint contains a remarkably detailed and complete fossil record of the biota in Northern Europe during the late Cretaceous and early Paleogene.

[4] A wide variety of benthic foraminifera species have been identified from the Cretaceous and Paleogene, with significant differences in abundance across the K–Pg boundary demonstrating the biotic turnover that occurred during the mass extinction event.

[4] Stevns Klint was the first known site to document the short-term survival of ammonites into the Paleogene, when they were originally thought to have gone extinct at the K-pg boundary.

The underground system of the fortress features 1.6 kilometres (0.99 mi) of tunnels, living quarters and command centers, including a hospital and a chapel.

[9] On 23 June 2014 it was announced that Stevns Klint and the Wadden Sea had been added to the UNESCO list of World Heritage Sites in Denmark.