What is formed when an ocean plate subducts or goes under a continental plate?

When an ocean plate subducts beneath a continental plate, it creates a subduction zone, leading to the formation of deep ocean trenches and volcanic arcs. The descending oceanic crust melts as it encounters higher temperatures and pressures, which can trigger volcanic activity on the continental plate. This process also contributes to earthquakes, as stresses build up in the Earth's crust. Over time, the interaction between these plates can significantly shape the geological features of the region.