Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← GeographyWhich outcome occurs when sediment pore pressure reduces during subduction?
A)Increased mantle wedge melting occurs
B)Episodic tremor and slip decreases
C)Accretionary wedge surface slope steepens✓
D)Trenchward forearc migration accelerates
💡 Explanation
A reduction in pore pressure increases effective stress and frictional resistance, forcing sediment consolidation via Compaction, therefore the wedge slope increases because shearing resistance dominates, rather than faulting, which alternative answers depend on.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Geography →- Which atmospheric change occurs when increased polar ice melt disrupts the Hadley Cell?
- Which effect impedes infrastructure development in regions experiencing active solifluction?
- Which mechanism dictates seasonal stratification in a dimictic glacial lake at moderate latitude?
- Which phenomenon causes effusive volcanism at mid-ocean ridges when magma upwells?
- Which outcome occurs when intense orographic lift acts upon humid air masses moving through narrow mountain stream valleys?
- Which effect is directly intensified when El Niño-Southern Oscillation (ENSO) causes a temporary reversal of the Walker circulation?
