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How Much Has Earth Changed In 200 Million Years?
Videos For An Earth In Transition – http://www.earth-heal.com/index.php/videos.html 
Our planet has not always had the seven continents. In the distant geological past there was only one continent - Pangaea, which was divided about 200 million years ago.
Scientists have now reconstructed in detail the transformation of our planet’s surface thanks to a new computer model.
On the attached video, you can see a simulation of the movement of Earth’s tectonic plates, and each frame is a period of a million years.
“Tectonic plates are changing the speed and direction of movement in a relatively short period of time of about a million years,” says Sabin Zahirović, geo-dynamicist at the University of Sydney, who led the research.
Zahirović and his colleagues are planning to reconstruct the movement of plates before the breakup of Pangaea.
The paper describing this research was published in the journal “Earth and Planetary Science Letters“.
This animation portrays the motion of continents (grey, yellow, orange and red) and oceanic plates (blue) since Pangea breakup from 200 million years ago. The model is a modified version of the Seton et al. (2012) plate reconstruction, and is used to analyse factors affecting plate velocities in Zahirovic et al. (2015). The results indicate that continental keels slow down plate velocities, where Archean cratons (red) have the strongest effect in limiting plate speeds. Go to EarthByte to download animation and Supplementary Material http://earthbyte.org/resources.html See news piece here: http://news.sciencemag.org/earth/2015/03/earths-tectonic-plates-skitter-about
Source: http://www.earth-heal.com/videos/viewvideo/4817/how-much-has-earth-changed-in-200-million-years.html
