* Convergent boundary: The Nazca Plate is subducting (diving) beneath the Caribbean Plate along a large portion of their boundary. This is the dominant feature, responsible for the formation of the volcanic arc of the Lesser Antilles.
* Transform boundary: In some areas, the plates slide horizontally past each other, forming a transform fault zone. This is particularly evident in the northern part of the boundary, along the Cayman Trough.
Therefore, it's more accurate to describe their relationship as a combined convergent and transform boundary.
