Answer:
Caves, sinkholes are the common structures in younger karst topography. Explanation:
- Karst topography is the result of the "dissolution of soluble rocks" like gypsum, limestone, and dolomite.
- Karst is usually characterized by caves, rocky ground, sinkholes, underground rivers etc.
- This is due to excavation of underground water on massive limestone and few minerals.
- The size of Karst varies from microscopic to hundreds of square miles. The topography is found all over the Earth.
- These are the fresh water sources to large population of the world as it is available as spring waters, ground waters, acquifers.
