Which phenomenon causes increased volcanic activity when glaciers melt near subduction zones?

💡 Explanation

Isostatic rebound reduces lithospheric pressure. The upwelling mantle melts easily, which leads to increased magma production and volcanism, because decompression melting occurs. Rebound causes magma formation, rather than hydrostatic damping or chemical weathering.

• Which outcome occurs when sediment supply decreases significantly in a coastal area with a longshore current?
• Which deformation threat arises from saturated permafrost thaw?
• Which process causes downslope soil movement attributed to solifluction in alpine arctic regions?
• Which outcome occurs when increased surface temperatures strengthen thermal expansion effects globally?
• Which risk increases when saturated sediment underlies structures?
• Which outcome results from increased weathering in fjords?