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← GeographyWhich mechanism increases sinkhole formation where groundwater extraction lowers aquifer pressure?
A)Subsidence-induced overburden stress fracturing✓
B)Hydrostatic uplift resistance reduction
C)Hydraulic conductivity gradient increase
D)Capillary action sediment consolidation
💡 Explanation
Subsidence-induced overburden stress fracturing causes increased dissolution because it physically weakens the overlying rock increasing its susceptibility to chemical weathering; therefore sinkholes become more common, rather than changes in hydraulic parameters being the primary cause.
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