Relating to or denoting the last period of the Mesozoic era, between the Jurassic and Paleogene periods, characterized by the dominance of dinosaurs and the emergence of flowering plants.

The cretaceous landscape was dominated by large dinosaurs and lush vegetation.

Composed of, containing, or resembling chalk; chalky.

The Cretaceous cliffs along the coast are bright white and distinctly cretaceous in appearance.