How Sinkholes Form: Step-by-Step Geological Process Explained #3497129 (License: Personal Use)

The diagram illustrates four progressive stages: (1) sediments spill into a cavity above carbonate bedrock; (2) continued spalling allows cohesive sediments to form a structural arch; (3) the cavity migrates upward as the roof collapses progressively; and (4) the arch fails, breaching the ground surface and creating a sudden, dramatic sinkhole. The process emphasizes the role of clay-rich overburden and soluble carbonate rock in subsidence events.

Used in geology education, hazard awareness materials, or civil engineering resources to explain karst-related subsidence. Matches user intent for understanding natural disaster mechanisms, land stability, or property risk assessment.