Which phenomenon results from sustained oceanic plate subduction?

💡 Explanation

An accretionary wedge forms where sediments are scraped off a descending oceanic plate via subduction; this sediment accumulation then melds to the overriding plate, because ongoing tectonic compression compacts everything together forming wedge shapes, therefore accretionary wedge structures are created, rather than deeper trenches or homogenizing mantle features.

• Which risk increases when a subsurface fault line intersects a large reservoir?
• Which outcome results when volcanic vent instability causes increased mass flow?
• Which outcome results when a meandering stream breaches its levee system during high discharge?
• Which geological hazard is amplified when permafrost underneath pipeline infrastructure thaws?
• Which immediate ecosystem shift occurs when methane clathrates destabilize along a subduction zone?
• Which outcome increases when polar ice melt accelerates?