Which condition causes the formation of lobate features in solifluction areas with coarse boulder obstructions?

💡 Explanation

When differential freeze-thaw cycles occur the upslope fine-grained material undergoes solifluction because thawing reduces shear strength, causing it to creep downslope and accumulate behind the obstruction, creating lobate features. Therefore cycles and creep create lobes rather than wind erosion, chemical reaction or techtonic uplift alone causing it which has a different system or trigger.

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