Since the first mapmakers of the Atlantic region, people have conjectured about continental drift. Alfred Wegener created both a resurgence in drift's popularity and unpopularity with his books. Today we use a variety of techniques undreamed of in Wegener's day to quantify the Dance of the Continents.
Computer models abound.
Here is our collection of plate reconstruction links and images and movies and whatever we find or create ourselves. All three above, on the same page. Thanks to y'all at the Geological Survey of Norway . You can download a test version that only allows two plates to be displayed at a time. I used the downloadable version to create the South Atlantic models listed above.