Known today as the “Black Belt,” the southeastern United States was once covered by an ancient sea—one that continues to shape modern history.

Shallow seas formed, dividing some continents. In the Late Cretaceous, for example, the Western Interior Seaway split North America into two landmasses. At its largest this sea was more than 3,000 ...

Xiphactinus trolled an ancient ocean called the Western Interior Seaway, which covered much of central North America during the Cretaceous. Though long extinct, if alive today the bony fish would ...

My research interests are concerned with the exploration for and production of hydrocarbons from stratigraphically trapped accumulations, and are focused on the clastic depositional systems of the ...

There are some animals emerging from the Late Cretaceous that are larger ... portions of North America were covered by the Western Interior Seaway, a vast inland sea that split the continent ...

For most of the Cretaceous, Canada’s prairie provinces were sitting deep underwater. A giant inland sea cut right across North America. Known as the Western Interior Seaway, it ran north to ...

The creatures have been around since the Cretaceous period, when dinosaurs roamed Earth and the climate was much warmer, as the Natural History Museum explained. The Western Interior Seaway also ...

The Interior Seaway, for example ... of dinosaur species for several million years leading up to the end of the Cretaceous. Sea Level The presence of 65- to 70-million-year-old fossilized ocean ...