Caribbean Plate 1843 in this region are possibly megathrust earthquakes. Along the geologically complex southern boundary, the Caribbean Plate interacts with the South American Plate forming Barbados, Trinidad and Tobago (all on the Caribbean Plate), and islands off the coast of Venezuela (including the Leeward Antilles) and Colombia. This boundary is in part the result of transform faulting along with thrust faulting and some subduction. The rich Venezuelan petroleum fields possibly result from this complex plate interaction. The Caribbean plate is moving eastward about 22 millimeters per year in relation to the South American plate. In Venezuela much of the movement between
Piracy in the Caribbean in Europe increasingly drove their plantation-based economies. The English had also expanded their dominion in the Caribbean and settled several new islands, including Bermuda in 1612, Antigua and Montserrat in 1632, and Eleuthera in the Bahamas in 1648, though these settlements began like all the others as relatively tiny communities that were not economically self-sufficient. The French also founded major new colonies on the sugar-growing islands of Guadeloupe in 1634 and Martinique in 1635 in the Lesser Antilles. However, the heart of French activity in the Caribbean in the 17th century remained Tortuga, the fortified island haven off the coast