Which mechanism causes mass wasting on steep slopes underlain by thawing permafrost?

💡 Explanation

When permafrost thaws, the active layer becomes saturated, decreasing friction between the soil particles because pore water pressure increases. Therefore solifluction occurs, rather than creep, landslides, or rockfalls, which require different triggers like overburden, seismic activity or progressive weathering.

• Which outcome is enhanced when prevailing winds exhibit greater variation?
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• Which mechanism minimizes seismic wave energy transmitted across a fault line during earthquakes?
• Which feedback mechanism predominates when increased sediment deposition raises an artificial levee's height?
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