Which outcome results when a glacial cirque degrades?

💡 Explanation

A tarn lake forms from glacial cirque degradation, because the erosion excavates a depression that then fills with meltwater after the glacier recedes in its uphill location; therefore, a tarn lake is the result rather than other fluvial features.

• Which risk increases when excessive irrigation is applied to an alluvial plain with poor drainage?
• Which mechanism causes fertile plains formation from loess?
• Which outcome accelerates when thawing permafrost increases soil saturation on a hillside?
• Which effect accelerates sinkhole formation within karst regions?
• Which phenomenon amplifies coastal upwelling along western continental margins?
• Which mechanism primarily sculpts ventifacts in periglacial environments?