The formation of waterfalls The waterfalls are always formed at upper courses. The structure of rocks may be different, some are less resistant rocks, and some are resistant
… rocks. At the upper courses, no. of tributaries are few, the discharg is small and erosion is the main work at this. (espevially downcutting and headward erosion) Water does not erode the hard and resistant rocks, but the soft rock does. The less resistant rocks eroded at a faster rate. Strong hydraulic action and abrasion undercut the base of waterfalls, waterfalls formed. (MORE)