Fur Formation

The Fur Formation is a marine geological sequence in the Limfjord region featuring exposed cliffs with layers of diatomaceous earth, clay minerals, and volcanic ash. These deposits were laid down when this area was covered by warm ancient seas.

This sequence formed about 55 million years ago during the Early Eocene period when temperatures were significantly higher than today. It captures a time marked by warm ocean conditions and rich biodiversity in ancient seas.

This formation draws scientists and geology enthusiasts who come to study the rock layers and fossils exposed in the cliffs. Local museums on nearby islands display discoveries and explanations of what these ancient deposits reveal about past life.

The best places to see these geological layers are the cliff coastlines of Fur Island and Mors Island, accessible from multiple locations. Wear sturdy footwear when exploring the cliffs, as the terrain can be uneven and slippery in wet conditions.

The layers hold remains of over 200 insect species, including early bird specimens, giving researchers a window into life millions of years ago. These fossil finds are known worldwide for their detail and diversity.

Location: North Denmark Region

Made from material: diatomaceous earth, Novaculite, volcanic ash

GPS coordinates: 56.83778,8.96194

Latest update: December 10, 2025 16:30