The Jurassic period lasted from 144 my to 208 my and occured in the middle of the Mesozoic era. During this period large dinosaurs appeared on Earth. This drawing shows the position of the continents at that time.

This drawing shows the continents about 150 million years ago, during the Jurassic period. In the Jurassic large dinosaurs appeared on Earth.

Earth looked like this when large dinosaurs first appeared.

The source of this material is Windows to the Universe, at http://www.windows.ucar.edu/ at the University Corporation for Atmospheric Research (UCAR). © The Regents of the University of Michigan. All Rights Reserved. Site policies and disclaimer