Coastal Zone: Coastal Landforms Flashcards
0
Q
Where does most of the erosion happen on the cliff?
A
At the foot.
1
Q
When waves erode cliffs what do they form?
A
Wave-cut platforms.
2
Q
When the foot of the cliff begins to erode what is formed?
A
A wave cut notch.
3
Q
After the rock above the notch becomes unstable and eventually collapses, what happens?
A
The collapsed material is washed away and a new wave cut notch starts to form.
4
Q
Repeated collapsing of the cliff results in what?
A
Cliff retreating.
5
Q
When the platform left behind retreats, what is made?
A
A wave cut platform.
6
Q
Headlands and bays form where what is different?
A
Erosion resistance
7
Q
Headlands are eroded to form what three things?
A
Caves, arches, stacks (and stumps)
8
Q
What type of rock are headlands usually made from?
A
Resistant rocks
9
Q
Name the 5 steps to make a stack.
A
- Waves crash into headlands and enlarge the cracks by hydraulic power and abrasion.
- Repeated erosion and enlargement of the crack makes a cave form.
- Continued erosion depends the cave until it break through forming an arch (Durdle door)
- Erosion contributes wearing away until the arch collapses.
- This forms a stack, an isolated rock like old harry in Dorset.
