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← GeographyWhich cavern formation results when carbon dioxide concentration lessens?
A)Calcite precipitation on cave structures✓
B)Increased rate of limestone dissolution
C)Expansion of water-filled cave passages
D)Decreased water flow through cave
💡 Explanation
Calcite precipitation occurs because a lessened carbon dioxide concentration shifts the carbonate equilibrium, favoring conversion of dissolved calcium bicarbonate to solid (calcite) form via degassing, therefore creating speleothems, rather than dissolving more limestone as would occur with higher CO2.
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