Which geographic outcome occurs when an oceanic plate subducts under a less dense continental plate?

💡 Explanation

When an oceanic plate subjects under a continental plate, friction and increased temperature cause the oceanic crust to melt due to dehydration reactions, allowing magma to rise, forming a volcanic arc. Therefore volcanic arc and mountain formations commonly result, rather than valleys, ridges or faults which require divergent or strike-slip boundaries.

• Which consequence results when groundwater table fluctuates substantially in karst landscapes?
• Which mechanism increases tropical cyclone intensity as they drift poleward?
• Which phenomenon creates characteristic linear valleys along oceanic transform plate boundaries?
• Which phenomenon enhances coastal upwelling along the western margins of continents due to Ekman transport effect?
• Which modification to the Walker circulation in the Pacific Ocean initiates an El Niño event?
• Which process most directly contributes to sorting alluvial sediments by particle size during fluvial transport?