Approximately 70 million years ago there was a sea where Denmark
is today. The sea was warm, and many different animals and
microscopic algae lived there. The algae had a shell of chalk. The
shells were over the years deposited into a thick layer of chalk at
the bottom of the sea.
Over the next many years life in the Cretaceous Sea gradually
vanished: the dinosaurs became extinct, the continents rose, and
mountains were created and eroded again. The old chalk sea bottom
rose above the sea, and the chalk emerged before the last glacial
age reached Denmark.
The ice that the last glacial age brought to Denmark scraped
enormous crusts off the old chalk sea bottom. The crusts were 50 m
thick and were bent, folded and pressed together as in a gigantic
concertina crash and formed Høje Møn. For the last 4,000 years the
sea has cut into the eastern coast of Møn forming the Cliff we know
On average a layer of approx. 20 - 40 cm disappears from the
Cliff annually. In about 10,000 years all of Høje Møn will have
been eaten away by the sea.
The Cliff is a piece of living nature. Slides and
falls may occur everywhere on the Cliff. All moving about in the
area is at your own risk