A 'blind valley' is associated with:

Question

Accepted Answer

A 'blind valley' is associated with Karst Topography because:

*   **Karst Topography and Blind Valleys:** Karst topography is characterized by soluble rocks like limestone, dolomite, and gypsum. Water easily dissolves these rocks, creating underground drainage systems. A blind valley is a valley that ends abruptly at a sinkhole or swallow hole where the stream disappears underground. This is a hallmark feature of karst landscapes. The surface stream flows into the sinkhole and continues its journey underground through the karst system.

Why the other options are incorrect:

*   **Sea Waves Topography:** Sea waves primarily create coastal features like cliffs, beaches, and stacks. While wave action can erode and shape coastlines, it doesn't typically form valleys that abruptly end with water disappearing underground.

*   **Wind Topography:** Wind erosion and deposition create features like dunes, loess deposits, and yardangs. Wind action doesn't typically lead to the formation of valleys with underground drainage systems.

*   **Glacial Topography:** Glaciers carve out U-shaped valleys, create features like moraines and eskers, and leave behind glacial lakes. While glacial meltwater can sometimes disappear underground, the primary characteristic of a blind valley (a valley ending abruptly at a sinkhole) is not a typical feature of glacial landscapes. Glacial valleys are usually open and connected, not abruptly terminating with a disappearing stream.