Which tectonic plate boundary type is exemplified by the formation of the Mariana Trench and the surrounding island arcs?

💡 Solution & Explanation

The Mariana Trench and associated island arc systems are formed along convergent oceanic-oceanic boundaries where the denser tectonic plate subducts into the mantle. Divergent boundaries typically form mid-ocean ridges, whereas transform faults involve horizontal sliding without crustal creation or destruction.