Which hazard increases following glacial cirque headwall over-steepening?

💡 Explanation

Rockfall risk increases via frost-weathering, because the freeze-thaw cycle weakens the now steeper, poorly supported rock faces in the cirque. This leads to enhanced fracturing, therefore increasing rockfall events, rather than sediment supply being increased through fluvial transport alone.

• Which landform results through seasonal thaw in permafrost?
• Which outcome occurs when thermokarst lake expansion destabilizes Arctic pipeline supports embedded within permafrost?
• Which outcome primarily occurs due to weakened gyre circulation?
• Which outcome results when a glacier retreats unevenly?
• Which outcome enhances stream meandering on shallow gradients?
• Which mechanism causes formation of placer deposits near oxbow lakes during fluvial transport?