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← GeographyWhich outcome indicates accelerating solutional widening of limestone fractures?
A)Rapid collapse in sinkhole clusters✓
B)Decreased regional aquifer hydraulic conductivity
C)Reduced speleothem growth rate observed
D)Increased surface stream baseflow variability
💡 Explanation
Rapid cluster collapse signals accelerated dissolution because increased water flow through widened pathways enhances limestone breakdown, a process called solutional widening; therefore, concentrated sinkhole activity happens, rather than diffuse aquifer changes.
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