The Cretaceous Period

Image courtesy W.H. Freeman and Company
At the end of the Cretaceous Period five groups died. They are the dinosaurs, pterosaurs, ichthyosaurs, pleisiosaurs and the mosasaurs. The movement of North America made mountain building forces, which formed the Rocky Mountains. In 17 C degree climates, cold blooded reptiles could live in northern climates. During the breakup of the super continent Pangea, it formed Laurasia and Gondwanaland. Toward the end of the Cretaceous Period, sea level rose, covering a lot of land area.
To learn more about the Cretaceous, try these:
  • Goodness, Gracious, it's the Cretaceous! - A poem by Josh.
  • Paleogeographic Map - Continents of the Cretaceous: cretaceo/cret1.jpg
  • Another - Cretaceous picture: cretaceo/cret2.jpg
    Produced by Josh Hamperian
    4th grade Quest class
    Glendover Elementary, Lexington KY
    Webpage copyright WebDoGS, Department of Geological Sciences
    University of Kentucky
    Images copyrighted by their respective owners.