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 risk increases along strike-slip plate boundary regions?
• Which outcome occurs when wind exceeds saltation threshold?
• Which phenomenon causes the deflection of large-scale ocean currents such as the Gulf Stream?
• Which topographic consequence results when regions experience long-term permafrost thaw?
• Which consequence results when increased sediment load overwhelms channel capacity in a proglacial stream?
• Which flow regime results when glacial meltwater discharge increases within a fjord system?