Which outcome occurs when subduction beneath an island arc increases sediment influx?

💡 Explanation

Increased sediment influx compacts the accretionary wedge through sedimentary loading, because greater weight from deposited material squeezes water out, therefore increasing density. This results in increased sediment compaction, rather than reduced magma flux or tectonic modifications.

• Which risk increases when poorly designed buildings experience liquefaction?
• Which risk increases for infrastructure built on an alluvial fan in a tectonically active region experiencing heavy seasonal rainfall?
• Which risk increases when construction restricts seasonal overflow on an alluvial fan?
• Which mechanism causes periodic bursts of sediment flow across alluvial fans during flash floods?
• Which geologic outcome occurs when fine sediment accumulates downwind?
• Which outcome commonly results from increased pore pressure?