Precambrian
Precambrian
note: the locations of the continents are correct for the time shown during the Precambrian, but the fossils shown are for the entire Precambrian period.

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This is the same view as the other maps on this site, with 0 deg Longitude at the center of the map).

750 million yrs ago, the continents were grouped together on the other side of the world at 180 deg Longitude. 

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so that you can see the continents together, as they were on the other side of the world.  After this time, the continents started to separate and congregate at Longitude 0 deg.
 
750 million years ago