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← GeographyWhich mechanism prevents full cavern collapse after extensive limestone dissolution?
A)Isostatic rebound compensates overburden stresses
B)Secondary mineral deposition strengthens arch✓
C)Reduced pore water pressures stabilize clay
D)Increased bioturbation decreases sediment consolidation
💡 Explanation
Secondary mineral deposition adds new mass to the cave ceiling through chemical precipitation, strengthening the overhead arch, because this opposes the force of gravity; therefore arches resist collapse rather than experience it because isostatic rebound acts over geologic time.
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