cretaceous

IPA: krɪtˈeɪʃɪs

Root Word: Cretaceous

(geology) The geologic period within the Mesozoic era that comprises lower and upper epochs from about 146 to 66 million years ago.

Examples of "cretaceous" in Sentences

The Ed Leith Cretaceous Menagerie.
Low diversification in the Cretaceous.
Something is either Cretaceous or it's not.
An armored dinosaur from the Cretaceous of yoming.
And all the bird species in the Cretaceous period.
Cretaceous sedimentation continued in the Perth Basin.
Cretaceous sedimentation continued in the Surat Basin.
The shell is subimperforate, globose, solid and cretaceous.
It contains rocks originally from the Paleozoic to the Cretaceous.
The loon like Hesperornis and the seabird Ichthyornis, found in the ancient chalk of a vanished Cretaceous sea.