Solnhofen Lithographic Limestone

The Jurassic Period lasted from 210 to 140 Million years, at this time dinosaurs were evolving. During this period the oceans were not as we know them today, there were two main contenantal masses separated by the Tethys Ocean.

This is a basic time scale and the dates that are associated with each time period. To get a closer view of the Jurassic Period and its subdivisions click on the Jurassic Period in the table.
This is the position of the continental landmasses and where they have moved through time by the process of plate tectonics. The fourth world from the top is what the earth looked like in the Jurassic Period (modified from Page et. al., 1989).