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← GeographyWhich effect causes rapid stalactite growth with elevated pCO2?
A)Increased calcite precipitation rate✓
B)Decreased drip water surface tension
C)Diminished evaporation from cave air
D)Greater laminar water flow volumes
💡 Explanation
Greater pCO2 in drip water promotes calcite dissolution upstream, increasing the calcium and bicarbonate ion concentration; therefore, calcite precipitation rate rises during degassing at the stalactite because increased ion concentration surpasses lower saturation thresholds, rather than from surface tension affecting growth.
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