Further work in the Cenomanian of North America will no doubt elucidate these paleogeographic and paleobiogeographic scenarios. |
The paleogeographic position of the Armorica crustal fragments between the Ordovician and Carboniferous is highly disputed though. |
A series of tectonic events in the Triassic, Jurassic and Cretaceous periods caused different paleogeographic regions. |