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← GeographyWhich consequence results when increased rainfall saturates unconsolidated sediment above karst bedrock?
A)Accelerated saltwater intrusion inland
B)Increased rates of soil creep
C)Formation of overburden collapse sinkholes✓
D)Episodic glacial outburst flooding
💡 Explanation
Over-saturation causes loss of strength, which forms sinkholes through suffosion. Gaps in the bedrock allow sediment to wash away because pore pressure increases due to rainfall, therefore overburden collapses rather than soil creep being more stable.
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