Find the aleutian trench that is circled on the map seen here. this area is the site where two tectonic plates meet. islands have formed due to volcanic activity; tsunamis are a reasonable occurrence; there is a great trench here, the aleutian trench. what is this region called where the heavier, more dense crust sinks beneath the lighter crust. a) subduction zone b) divergent oceanic-continental plate boundary c) convergent continental-continental plate boundary d) divergent oceanic-oceanic plate boundary