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
San Andrés (island) Colombia to its jurisdiction only insofar as they concerned sovereignty over the islands of Saint Andrew, Providence and Saint Catherine". Saint Andrew is the largest of the island group in the Department of the Archipelago of Saint Andrew, Providence and Saint Catherine. Saint Andrew is located in the Caribbean Sea, about northwest of the coast of Colombia. The island is (11 km is also mentioned here) in length and in width. It has an area of within the total area of the group of islands of ( is also mentioned in this reference for Saint Andrew), making it the largest