Waterfall Flashcards
1
Q
Describe the formation of waterfall
A
- The soft rock erodes more quickly, undercutting the hard rock.
- Over the time, water erode the soft rock and form a plunge pool by abrasion and hydraulic action.
- The hard rock is left overhanging and eventually collapses because it isn’t supported.
- The fallen rock crashed into the plunge pool and caused more erosion.
- Over the time, the process repeated and the waterfall retreats upstream.
- A gorge is formed as waterfall retreats.
2
Q
What is a waterfall?
A
Waterfall is a vertical drop of stream fall over a rocky ledge into a plunge pool
3
Q
Where does waterfall often form?
A
Waterfall often form in the upper stages of a river where it flows over different bands of rock