Which outcome results when thermal stress exceeds cohesion limits in high-altitude cirques?

💡 Explanation

Frost wedging causes rock disaggregation in cirques because repeated freeze-thaw cycles expand water in cracks, therefore leading to rockfall, rather than ice accumulation which is precipitation controlled or chemical weathering typical in warmer environment.

• Which phenomenon initiates volcanic island formation above hotspots?
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• Which consequence results when pyroclastic flows rapidly melt glaciers?
• Which process accelerates oxbow lake formation when tectonic subsidence lowers floodplain elevation?
• Which erosional mechanism primarily shapes the steep U-shaped valleys characteristic of Norwegian fjords?
• Which mass wasting outcome accelerates when permafrost degradation increases the active layer thickness?