The Caribbean did have a much larger landmass 40 to 50 million years ago, scientists from the University of Greifswald in Germany say.
At depths between 2,625 to 3,281 feet (800 and 1,000 meters), they discovered seamounts made up from fossilized coral in the Hess-Escarpment in the central Caribbean.
The 620-mile linear underwater cliff in the Caribbean Sea corresponds to an 80-million-year-old fault along the Caribbean Sea floor.
During an expedition aboard the research vessel Meteor, the researchers first noticed that existing sea maps were vastly inaccurate.
Sonar scans showed an underwater mountain range rising up 3,281 feet (1,000 meters) from the ocean floor where it should be flat, according to old charts, and a flat sea bed where the maps indicated submerged mountains.
An underwater robot called