Neornithischia

The Lake Erie Formation is a wide formation originating from the Albian-Cenomanian Appalachia (modern-day Great Lakes) in the Mid-Cretaceous.

It was mostly floodplains, with deltas, streams, and bogs making up most of the environment, and containing all sorts of vegetation, such as Cretaceous redwoods, regnellites, ground fibre, and ground fruit, and possibly early pteridosperms. The known fauna (to in-universe paleontologists) include:

• Naviadupleovenator erieii

• Sauraves michigensis

• Pachystegocephale appalachiani

• Erie Fossil Abelisaurid (Abelisauridae indet)

• Erie Rib Specimen (Dinosauria indet)

• Erie Coelecanth (Dipnoi indet)

• Erie Halecomorphi (Halecomorphi indet)

• Erie Sauropod (Sauropoda indet)

If you would like to know more about the speculative project, about the fauna, predator-prey dynamics, and differences between what is believed in-universe to what they're meant to be, just ask! Or, what the hell some of these species are, go ahead!