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 process shapes the islands due to wave refraction?
• Which process primarily maintains upwelling along the western coasts of continents?
• Which geological outcome is accelerated when sediment accumulates near subduction zones?
• Which outcome occurs when intense surface wind action primarily affects unconsolidated sediments in an arid environment?
• Which mechanism creates fringing reef 'haloes' in tropical islands?
• Which effect influences deep ocean currents due to density differences from brine rejection during sea ice formation?