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← GeographyA rapid drop in the local water table triggers which sinkhole mechanism?
A)Support removal of sediment infill✓
B)Accelerated chemical weathering of shale
C)Expansion of clay-rich topsoil layers
D)Increased hydrostatic pressure on faults
💡 Explanation
Rapid water table decline leads to reduction of pore pressure, therefore the mechanism causing sinkholes is support removal of sediment infill, because there is less buoyant support; rather than weathering or hydrostatic pressure increases.
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