The Nyker Group is a group of geological formations from the Early Cretaceous, about 146 to 140 million years ago.

It includes the Rabekke, Robbedale and Jydegaard Formations.

It dates to about 146 to 145 million years ago, at the Jurassic-Cretaceous boundary.

The formation has the significance of having the first Scandinavian mammal, Sunnyodon notleyi, uncovered from it.

The first dinosaur found on Denmark, Dromaeosauroides bornholmensis, was discovered in this formation.