This animation is made from a time series of maps reconstructing the movements of continental crust or blocks, as South America pulled away from North America, starting 170 million years ago. Note that South America is still clinging to Africa at the beginning of the series.

Source: www.youtube.com

The land bridge connecting North and South America is hardly permanent (on a geological time scale that is).  This video is an animated version of the still maps from this article.  

Tags: Mexico, tectonicsphysical, video, Middle America.

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