Which ground deformation occurs when thawing permafrost causes differential settling below a roadbed?

💡 Explanation

When permafrost thaws unevenly, thermokarst subsidence occurs because the ground loses structural support as ice turns to water, causing depressions and uneven settling. Therefore, this results in thermokarst subsidence, rather than frost heave, isostatic rebound, or liquefaction which involve different processes.

• Which process accelerates the lateral migration of a river's meander across an alluvial plain landscape?
• Which mechanism impacts building foundations near transform faults?
• Which ecological consequence results downstream when coastal upwelling weakens due to reduced offshore wind stress?
• Which outcome occurs when wind-driven surface currents converge within an ocean gyre?
• Which phenomenon exacerbates lahar formation following a volcanic eruption event?
• Which outcome occurs when glaciers retreat in semi-arid regions?