Waterfall 5.0 / 5 based on 1 rating ? GeographyWater and riversGCSEAQA Created by: Former MemberCreated on: 09-04-13 11:34 Where is the waterfall formed? In the upper coarse of the river 1 of 8 The first stage of waterfall The water flows over an area of hard rock, followed by an area of softer rock 2 of 8 What is the second stage of waterfall The softer rock erodes more than the hard rock, creating a "step" in the river 3 of 8 What is the third stage of waterfall As the river flows over the step, the softer rocks is eroded more and more 4 of 8 What is the fourth stage of waterfall Eventually, a steep drop is formed, which is called a waterfall 5 of 8 What is the fifth stage of waterfall The hard rock is undercut by erosion, it becomes unsupported & collapses 6 of 8 What is the sixth stage of waterfall? The collapsing rocks are swirled at the foot of the waterfall, where the softer rock is eroded by corrasion. This forms a deep plunge pool. 7 of 8 What is the seventh stage of waterfall? Overtime, more undercutting causes more collapses, this makes the waterfall retreat (move back up the channel). This forms a steep-sided gorge 8 of 8
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