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← GeographyClay accumulation increases markedly when which pedogenesis mechanism occurs?
A)Illuviation from upper soil horizons✓
B)Erosion due to raindrop impact
C)Arid regosol with limited development
D)Cryoturbation in periglacial environments
💡 Explanation
Illuviation is deposition of soil material that is leached from upper soil horizons; clay accumulates because smaller clay particles are transported downward in soil profiles, therefore increasing clay percentages rather than sand and silt.
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