Which geomorphic feature commonly results from thermal expansion of permafrost?

💡 Explanation

Polygonal ground forms because repeated freeze-thaw cycles cause ice wedging; this cycle expands and contracts permafrost. Therefore, patterned ground develops, rather than accelerated erosion, because expansion fractures the surface.

• Which phenomenon increases when locked transform faults rupture?
• Which outcome occurs when trade winds weaken due to reduced pressure gradient and Coriolis effect in the Pacific?
• Which landform develops because differential weathering acts after glacial cirque formation?
• Which outcome is enhanced by the Coriolis effect on large saltwater bodies?
• Which atmospheric phenomenon results from strong latitudinal temperature gradients combined with Earth's rotation?
• Which mechanism causes stream channel sinuosity in meandering river systems despite continuous downslope flow?