Which karst feature represents the most advanced stage of erosion?

• A. Sinkhole
• B. Tower karst
• C. Cave system
• D. Disappearing river

Answer: (B)

Tower karst represents the most advanced stage of erosion in karst landscapes, which is characterized by the dissolution of soluble rocks such as limestone, gypsum, or salt. Over time, as erosion continues, large limestone hills and features become isolated, forming vertical limestone towers or peaks. This process involves significant geological activity, including extensive underground drainage and the removal of material that leads to the formation of these dramatic features.

As the erosion progresses, the softer surrounding limestone erodes away more rapidly than the harder rock, leading to the creation of these distinctive towers. The presence of tower karst indicates a landscape that has undergone a long-term and complex interaction with water, further showcasing the prolonged and advanced development of karst processes. Thus, tower karst exemplifies the culmination of erosional processes in karst topography, making it the correct choice in this context.