10.6 Cliffs and wave cut platforms

Question 1

What are the different types of erosional features on the coast

Answer 1

Wave-cut platforms
Caves, arches, stacks and stumps

Question 2

Explain the formation of a wave-cut notch and wave-cut platform

Answer 2

• the waves attack the base of the cliff through the processes of abrasion, corrosion and hydraulic action
• over time the cliff will be undercut and a wave-cut notch is formed
• the wave-cut notch leaves an area above the cliff unsupported. This is known as an overhang
• eventually the overhand becomes unstable and collapses. Further cliff retreat will form a wave-cut platform
• at low tide the wave-cut platform is visible

Question 3

Outline the characteristics of a wave-cut platform

Answer 3

• generally only visible at low tide
• slopes gently down to the sea at an angle of 3-4 degrees