Describes the formation of waterfall

1. River Features:
(ii) Waterfall

3. Waterfall can be formed in 2 ways:
1. Different rock resistance
2. Faulting
Watch the following video to understand
how waterfalls are formed.

4. 1. Formed by Differential Rock Resistance

6. • River flows over a band of more resistant and
less resistant rock.

7. • River flows over a band of more resistant and
less resistant rock.
• The less resistant rock erodes faster than the
resistant rock

8. • River flows over a band of more resistant and
less resistant rock.
• The less resistant rock erodes faster than the
resistant rock
• Causing a change in the gradient of the river.

9. • River flows over a band of more resistant and
less resistant rock.
• The less resistant rock erodes faster than the
resistant rock
• Causing a change in the gradient of the river.
• Over time, after repeated pounding, the river
bed becomes steeper causing water to flow
down vertically and rapidly.

10. 2. Formed by Faulting

12. • Faulting causes thebeing lifted up relative to
with one blocked
land to be displaced,
the adjacent block.

13. • Faulting causes thebeing lifted up relative to
with one blocked
land to be displaced,
the adjacent block.
• The height vertically will cause the river to
flow down
difference

14. • Faulting causes thebeing lifted up relative to
with one blocked
land to be displaced,
the adjacent block.
• The height vertically will cause the river to
flow down
difference
• Pounding the river bed and a plunge pool is
formed.