Which risk increases when glacial 'freeze-thaw' cycles erode headwalls?

💡 Explanation

Avalanche frequency increases because repeated freeze-thaw weathering causes rock fracturing and instability. This *frost wedging* detaches rocks, therefore avalanche frequency rises; rather than esker changes or tunnel erosion, these are unrelated to the headwall failure.

• Which consequence results when crust subducts too rapidly?
• Which process determines shape when freeze-thaw weakens bedrock walls above a glacial cirque?
• Which hydrologic consequence accelerates when arctic seabeds thaw?
• Which mechanism causes fertile plains formation from loess?
• Which consequence develops when intense rainfall saturates unconsolidated tephra deposits?
• Which process increases discharge variability downstream in alluvial rivers?