Which outcome arises as oceanic crust subducts at a deep-sea trench off the coast of Chile?

💡 Explanation

When oceanic crust subducts under continental crust, compressional forces lead to shortening and thickening of the continental crust as material is accreted because the descending plate is scraped. Therefore continental thickening results, rather island arcs or spreading which involves rising magma, and trasform faults result from lateral motion.

• Which risk escalates when shield volcano slope instability occurs?
• Which downslope movement occurs when permafrost thaw increases soil moisture above sediment shear strength on a tundra slope?
• Which structural outcome is most likely following extensive solifluction on an engineered slope in a periglacial region?
• Which phenomenon results when trade winds weaken in the Pacific Ocean preventing upwelling in an established gyre?
• Which consequence results downstream when decreased sediment deposition decreases permeability in an alluvial aquifer?
• Which outcome is accelerated in fjord ecosystems experiencing reduced sea ice cover?