What is the primary geomorphological process responsible for the formation of the tiered waterfalls, such as Chitrakote and Tirathgarh, on the rivers of the Bastar plateau in Chhattisgarh?

💡 Solution & Explanation

Waterfalls like Chitrakote on the Indravati River and Tirathgarh on the Kanger River are formed due to differential erosion where softer rock layers beneath harder caprocks are eroded away by river action. The Bastar plateau features ancient sedimentary and igneous formations that create distinct knickpoints along river profiles as tectonic uplift occurs. Karst topography also exists locally in Kanger Valley, but the prominent waterfalls result from fluvial knickpoint retreat.