Which outcome occurs when a cave's groundwater calcium concentration decreases significantly?

💡 Explanation

Decreased calcium results in speleothems dissolving through congruent dissolution, because the water is undersaturated; therefore, speleothems erode, rather than grow. Stalactites become weaker, but reverse weathering is the direct, enhanced process in these conditions.

• Which flow regime change arises when high evaporation rates decrease freshwater stream discharge into saline estuary environments?
• Which geological change results when thermal convection weathers a subducting oceanic plate?
• Which risk increases when barrier islands retreat landward?
• Which outcome results when a glacial cirque degrades?
• Which outcome results when rising sea temperature increases?
• Which mechanism dictates barrier island formation in coastal systems?