Jurassic Fossils
The Jurassic Period lasted for 56 million years starting 201 million years ago. Dinosaurs dominate terrestrial environments, ichthyosaurs and plesiosaurs are marine reptiles, and the ammonites poliferate.
Jurassic Fossils |
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The Jurassic Period lasted for 56 million years starting 201 million years ago. Dinosaurs dominate terrestrial environments, ichthyosaurs and plesiosaurs are marine reptiles, and the ammonites poliferate. Morrison Formation, Western Colorado |
 Pieces of a dinosaur jaw with roots of the teeth. |
 Valvata scabrida, a fresh water snail |
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