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← GeographyWhich outcome occurs when groundwater depletion lowers the potentiometric surface in soluble bedrock?
A)Increased density of sinkhole formation✓
B)Elevation of the regional water table
C)Decreased frequency of Karst springs
D)Enhanced clay mineral weathering rates
💡 Explanation
An increased density of sinkholes occurs because the lowered potentiometric surface reduces support for overlying sediments promoting collapse via mechanical suffosion into solution voids rather than supporting bedrock. Therefore, sinkholes increase rather than the stability remaining unchanged.
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