Which outcome of progressive frost weathering defines cirque formation?

💡 Explanation

Cirques form via nivation and glacial erosion; bergschrund development promotes freeze-thaw, leading to backwall shearing and headwall retreat, therefore deepening and enlarging the cirque rather than creating eskers or kettles.

• Which mechanism explains coral bleaching during a strong El Niño event in the Pacific Ocean?
• Which outcome will accelerate barrier island erosion when longshore drift weakens?
• Which outcome is directly amplified when decreased Arctic ice cover reduces the Earth's albedo?
• Which feedback mechanism regulates global ocean thermohaline circulation when sea ice formation increases?
• Which outcome occurs as basalt undergoes spheroidal chemical weathering?
• Which increased outcome occurs when heavy agricultural irrigation overlies karst?