Which mechanism best explains patterned ground formation in periglacial loess deposits?

💡 Explanation

When temperatures fluctuate across freezing and thawing points, cryoturbation—frost sorting—occurs because the heaving and subsidence of different soil components sorts them by size, which results in patterned ground formation. Therefore, cryoturbation explains pattern formation rather than other processes, such as wind or chemical erosion.

• Which mechanism causes reduced sediment deposition rates within an oxbow lake compared to the active river channel?
• Which outcome occurs when a meandering stream erodes laterally until encountering a resistant geological formation beneath an oxbow?
• Which mechanism causes a meandering stream to accelerate lateral erosion on its outer bend?
• Which land shift results when sediment flux overwhelms fluvial avulsion?
• Which process dominates when water flow velocity decreases across an alluvial fan?
• Which process accelerates when permafrost underlying a cirque thaws due to rising air temperatures?