Cretacean

Modern mammals started to radiate way before the Cretacean extinction.

Scientists Come to a Conclusion: Asteroid Killed the Dinosaurs | Universe Today 2010

Cretacean period, while, between these formations and the Granitic and Silurian, extensive lakes were left which have since disappeared but which may still be traced in the level steppes of Aragón and the two Castiles.

The Catholic Encyclopedia, Volume 14: Simony-Tournon 1840-1916 1913

Within the sedimentary trough of the Paris Basin, a slight Cretacean platform like the meadow land of Perche [1044] (200 to 300 meters elevation) introduces an area of thin population devoted to horse and cattle raising in close proximity to the teeming urban life of Paris.

Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography Ellen Churchill Semple 1897

Most of the ecoregion’s geological formations are recent deposits of gravel, sands and clays, but marine outcrops of the lower Cretacean (65-140 million years) stand out, with sedimentary volcanic rocks and quarternary fossiliferous deposits.

Sechura desert 2008