Cretaceous

The first dinosaurs were modestly sized, a far cry from the immense dinosaurs of the subsequent Jurassic and Cretaceous Periods.

Elasmosaurs are a genus of plesiosaur that lived in North America during the Late Cretaceous.

Nasutoceratops — which means big-nosed horn face — lived 76 million years ago, in the late Cretaceous period, in what was then a subtropical swampy environment.

Impressions of leaves found in the Upper Cretaceous rocks of the Yellowstone Valley cannot be distinguished from those of the leaves of our two American hazel species of today.

Stegosaurs dwindled in the Cretaceous and appear to have gone extinct before the end of the period.

We are going to be using multi-media in order to put people in the Cretaceous era where Sue lived.

As with the Lejeuneaceae, this pattern of massive speciation appears to be correlated with the Cretaceous explosion of the angiosperms and the simultaneous creation of a host of new microenvironments, differing in humidity, light intensity, texture, etc.

Fossils are particularly well described from the Carboniferous, Triassic, Jurassic and Cretaceous periods and have been found in the USA, England, Russia, Lebanon and Germany. Sites such as Lyme Regis in Dorset have particularly yielded number of Jurassic “squid” ink sacs and nodules (Doguzhaeva et al. 2004).