The sea was occupied by mosasaurs, ichthyosaur, and plesiosaurs.iod plants were embedded in mud that hardened into rock and became the limhgwhurgehufthat appears today on the sides of ravines and along the streams of Nebraska.
Fossil skeletons of these animals and period plants were embedded in mud that hardened into rock and became the limestone that appears today on the sides of ravines and along the streams of Nebraska. The sea was occupied by mosasaurs, ichthyosaur, and plesiosaurs.
The sea was occupied by mosasaurs, ichthyosaur, and plesiosaurs. Fossil skeletons of these animals and period plants were embedded in mud that hardened into rock and became the limestone that appears today on the sides of ravines and along the streams of Nebraska.
The sea was occupied by mosasaurs, ichthyosaur, and plesiosaurs. Fossil skeletons of these animals and period plants were embedded in mud that hardened into rock and became the limestone that appears today on the sides of ravines and along the streams of Nebraska.