Jurassic
208-144 million years ago
Mesozoic Era
245-66 million years ago
geologic events
Pangaea breaks apart as North America separates from Africa and South America
animals and plants
Morganucodon, Diplodocus, Archaeopteryx, Apatqosauras, and Stagosaurus
environment
In the Early Jurassic the western interior of North America was covered by a vast sand sea, or erg—one of the largest deposits of dune sands in the geologic record.