During the late Cretaceous, about 90 to 70 million years ago, Louisiana was submerged under the warm and shallow Western Interior Seaway. Here, animals like Ginsu sharks, plesiosaurs, mosasaurs (huge, carnivorous, marine lizards), huge turtles called Archelon, and even Hesperornis (a fully aquatic bird), lived there. The waters were also fished by flying birds called Icthyornis.
Note that some of these organisms are speculative; the reason being that they were found in very nearby areas with exactly the same habitat and at the same time.
in prehistoric times, ichthyosaurs lived in Nevada.
dinosaurs
sharks
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In prehistoric times Florida was underwater in the Siluarian Sea so you would find many sea creatures back then.
Dinosaurs and birds lived in North Carolina in prehistoric times
dinoshark could of lived in the prehistoric times as one of the sea creatures....in the ocean.
Alligators and Crocodiles lived in prehistoric times, however are not considered proper dinosaurs. Most prehistoric creatures were made extinct many years ago.
Fossils of Procamelus and Protolabis in the northeast, and Stenomylus in the northwest have been found in Nebraska.
During the time of prehistoric animals, most notably dinosaurs, California was home to many different species. These included the Smilodon, or the saber-toothed tiger, the Californiasaurus, and the Nodosaurus.
..During that time, some scientists believe Ohio was at least partially underwater, because many Trilobites were found there. Some also believe that erosin destroyed most of the remains. Edmontonia remains have been found though, and those are pretty sweet.
It was a remarkable project, and the book instantly became a valuable contribution to paleontology. The scientific study of fossils is known as paleontology.