12. Wave erosion is greatest when waves break against the foot of the cliff. With wave energy at a maximum, the waves undercut the foot of the cliff to form a wave cut notch Over time the notch enlarges and the cliff above it cannot be supported and so collapses As this is repeated, the cliff retreats (and often increases in height). The gently sloping expanse of cliff marking the foot of the retreating cliff is known as the Wave cut platform
13. Does this remind you of anything? Waterfalls and gorges – very similar ideas!
18. How was the arch at Durdle Door, Dorset, formed? Abrasion/Corrasion Hydraulic action Solution/Corrosion Attrition
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20. 1. The waves erode FAULTS (cracks) in the headland. 2. The waves eventually erode through the headland to form an ARCH . 3. The arch becomes unsupported and collapses to form a STACK . 4. A STUMP is formed from the collapsed stack. C D B A Match the image with the most appropriate label.