At an oceanic-continental convergent boundary, which surface features are typically formed?

At an oceanic-continental convergent boundary, which surface features are typically formed?

• A. Trench
• B. Volcanoes and mountains
• C. Mid-ocean ridge
• D. Rift valley

Answer: (B)

At an oceanic-continental convergent boundary, the oceanic plate sinks (subducts) beneath the lighter continental plate. As it descends, water released from the subducting slab lowers the melting point of mantle rocks above it, causing magma to form. This magma then rises through the continental crust and leads to volcanic activity along the margin, building volcanoes. The combination of volcanic input and compressional forces also uplifts and thickens the crust, creating mountains on the overriding continent. Mid-ocean ridges and rift valleys come from divergent boundaries, not this convergence scenario, and while a deep trench forms at the boundary, the surface features most characteristic on the continent are volcanoes and mountains.

At an oceanic-continental convergent boundary, the oceanic plate sinks (subducts) beneath the lighter continental plate. As it descends, water released from the subducting slab lowers the melting point of mantle rocks above it, causing magma to form. This magma then rises through the continental crust and leads to volcanic activity along the margin, building volcanoes. The combination of volcanic input and compressional forces also uplifts and thickens the crust, creating mountains on the overriding continent. Mid-ocean ridges and rift valleys come from divergent boundaries, not this convergence scenario, and while a deep trench forms at the boundary, the surface features most characteristic on the continent are volcanoes and mountains.