Waec Model Questions Vol1 2021 Geography Question 21
Practice objective / multiple choice question 21 from the 2021 Waec Model Questions Vol1 Geography examination.
In a region, a river flows over a resistant sandstone forming a waterfall. Downstream, the river enters a softer shale and erodes vertically at an average rate of 0.5 mm per year. The waterfall formed 10 000 years ago. Assuming the erosion rate has remained constant, what is the approximate depth of the gorge that has developed downstream of the waterfall?
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About This Question
This is Waec Model Questions Vol1 2021 Geography Question 21. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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