Which outcome causes expanding cirques in glaciated mountains?

💡 Explanation

Expanding cirques primarily result from nivation, where repeated freeze-thaw cycles weaken and erode the rock at the headwall because differential weathering exploits weaknesses rather than strictly abrasion. Headwall steepening results; therefore nivation enhances erosion rather than frost wedging's dispersed action.

• Which landform results when differential erosion breaches arches in coastal headlands?
• Which outcome occurs following the moraine dam failure surrounding an alpine lake?
• Which outcome rapidly occurs in coastal bluff systems experiencing toe erosion?
• Which effect primarily inhibits nutrient mixing in a meromictic lake's water column?
• Which atmospheric pressure outcome occurs when strong insolation amplifies Hadley cell convection?
• Which outcome occurs when thawing permafrost destabilizes tundra?