Which landform results when water percolates through weakened limestone?

💡 Explanation

Extensive karst valleys form because the chemical _dissolution_ of underlying rock widens pre-existing joints; therefore, the valley floor drops unevenly across a wide region, rather than building a single river channel.

• Which mechanism influences stream patterns deflected eastwards near the poles?
• Which outcome occurs when ice-sheet unloading follows deglaciation?
• Which outcome occurs when prevailing winds encounter volcanic islands?
• Which outcome accelerates sea stack degradation when wave refraction concentrates energy?
• Which risk escalates when a lava dome's exterior cools?
• Which outcome occurs when sparse desert vegetation reduces surface drag?