Which mechanism causes inward rock fracturing within cirques?

💡 Explanation

Glacial headwalls experience intense freeze-thaw cycles in saturated cracks, causing growth of ice crystals thus **frost wedging**. Repeated cycles widen fractures, rather than hydrolysis, because water accessibility limits chemical weathering effectiveness.

• Which crustal deformation occurs due to hydrated mineral formation during oceanic plate subduction?
• Which outcome occurs when subsurface pressure exceeds frictional strength along a fault?
• Which increased risk occurs when increased pore fluid pressure exists along a fault line near a silicic magma chamber?
• Which geological process accelerates when thermokarst lakes form in arctic permafrost regions?
• Which effect accelerates solifluction on Arctic slopes following permafrost thaw due to rising temperatures?
• Which slope instability process accelerates cirque formation in periglacial environments with freeze-thaw cycles?