Which outcome occurs when a sea stack’s foundation undergoes prolonged undercutting?

💡 Explanation

Mechanical breakup intensifies as undercutting concentrates wave energy on the stack base, causing instability. This process, termed basal sapping, weakens the structure, eventually leading to collapse because the structural integrity is compromised; therefore stack reduces from increased weathering, rather than deposition.

• Which outcome frequently occurs due to longshore drift approaching jetties?
• Which phenomenon accelerates loess deposit armoring, reducing erosion?
• Which outcome occurs when a meandering stream incises rapidly?
• Which mechanism exacerbates seismic activity when injecting wastewater near an active fault line?
• Which outcome occurs when increasing alluvial deposition creates a steeper slope along a river's floodplain?
• Which outcome occurs when rapid surface cooling inhibits lava flow?