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← GeographyWhich process leads to soil subsidence above loess deposits?
A)Hydrocompaction from excessive irrigation✓
B)Oxidation of ferrous minerals
C)Cryoturbation exceeding material strength
D)Bioturbation by deep rooting plants
💡 Explanation
Excessive irrigation compacts the loosely packed silt grains of the loess deposits via hydrocompaction, and this process reduces the soil volume because pore-water pressure increases, therefore creating subsidence rather than uplift from mineral oxidation.
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