Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← GeographyAlong plate boundaries, which consequence results when lithospheric pressure decreases?
A)Increased magma production and volcanism✓
B)Lower silica content in extrusions
C)Reduced occurrence of deep earthquakes
D)Decreased plate subduction velocity
💡 Explanation
Decreased lithospheric pressure causes decompression melting which leads to magma generation and volcanism at plate boundaries, because the reduced pressure lowers the melting point of mantle rocks; therefore, magma production increases, rather than remaining static, given constant heat input.
🏆 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 outcome occurs when katabatic winds encounter stable stratification?
- Which phenomenon affects coastal regions during the cyclical subduction of the Juan de Fuca plate?
- Which mechanism explains cave passage widening during speleogenesis?
- Which risk increases when reduced sediment supply hinders sand deposition behind a developing coastal barrier island?
- Which disruptive effect arises from upwelling's sudden reduction?
- Which phenomenon strongly mediates the magma composition produced during oceanic plate subduction under a continent?
