The Western Interior Seaway was a huge inland sea.

The site at the time was the shore of a shallow inland sea the Western Interior Seaway.

It was on the western margin of the Western Interior Seaway.

Parts of Missouri were covered by the Western Interior Seaway at the time.

The Western Interior Seaway was a shallow sea, filled with abundant marine life.

Deinosuchus was present on both sides of the Western Interior Seaway.

It was an important part of the animal community in the Western Interior Seaway.

This sea is known as the Western Interior Seaway.

At the time, this location was covered by part of the Western Interior Seaway.

Texas was largely covered by the Western Interior Seaway at the time.