Final answer:
The type of plate boundary associated with Atlantic-style margins where subduction takes place is a convergent boundary.
Step-by-step explanation:
The type of plate boundary associated with Atlantic-style margins where subduction takes place is a convergent boundary. In convergent boundaries, one tectonic plate subducts or goes beneath another plate. Subduction occurs when the subducting plate has an oceanic crust. As the oceanic plate subducts, it releases water from hydrated minerals, causing volcanic activity along the subduction zone.