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← GeographyWhich outcome occurs when wind exceeds saltation threshold?
A)Dune crest destabilization and avalanche✓
B)Formation of playa lake evaporate
C)Development of desert pavement lag
D)Increased chemical weathering hydration
💡 Explanation
Dune crest destabilization occurs with exceeding shear stress due to increased wind. Grain avalanches initiate through grain-flow, because the angle of repose is exceeded, therefore crest features erode rather than maintain form due to saltation impact thresholds.
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