By origin, it was a unique island that the tectonic and volcanic earthquakes separate to create an archipelago due to the subduction zone between the South American plate, the North American plate and the Caribbean plate.
Por procedencia, éra unha única illa que os terremotos tectónicos e volcánicos separaron para crear un arquipélago debido á zona de subducción entre a placa de América do Sur, a placa de América do Norte e a placa do Caribe.