Editing Cretaceous (section)

==== North America ====
{{see also|:Category:Cretaceous System of North America}}
[[File:Map of North America with the Western Interior Seaway during the Campanian (Upper Cretaceous).png|thumb|Map of North America During the Late Cretaceous]]
During the Cretaceous, the present North American continent was isolated from the other continents. In the Jurassic, the North Atlantic already opened, leaving a proto-ocean between Europe and North America. From north to south across the continent, the [[Western Interior Seaway]] started forming. This inland sea separated the elevated areas of [[Laramidia]] in the west and [[Appalachia (landmass)|Appalachia]] in the east. Three dinosaur clades found in Laramidia (troodontids, therizinosaurids and oviraptorosaurs) are absent from Appalachia from the Coniacian through the Maastrichtian.<ref name=Brownstein2018>{{cite journal |last=Brownstein |first=Chase D |year=2018 |title=The biogeography and ecology of the Cretaceous non-avian dinosaurs of Appalachia |url=https://palaeo-electronica.org/content/2018/2123-appalachia-biogeography |journal=[[Palaeontologia Electronica]] |volume=21 |pages=1–56 |doi=10.26879/801|doi-access=free }}</ref>