Were Antarctica and North America Once One Continent? A Single Boulder Provides Clue
The
continual shifting of continents has led to the theories that, as in
the cases of Pangaea and Rodinia, many, if not all of our continents
were at one time or another connected. One particular theory -the SWEAT theory ( standing for southwestern United States
and East Antarctica)- theorizes that the southwestern United
States was at one time connected to East Antarctica.











