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← GeographyWhich mechanism causes desert ventifact formation on basalts?
A)Abrasion by saltating sand grains✓
B)Dissolution through carbonate precipitation
C)Oxidation causing widespread surface exfoliation
D)Hydration weathering causing granular disintegration
💡 Explanation
Ventifacts form due to wind-driven abrasion. Saltating sand grains impact the rock surface, gradually shaping it because kinetic energy transfer carves away less resistant minerals; therefore, abrasion creates polished, faceted surfaces rather than chemical weathering from dissolution or oxidation.
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