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Quiz yourself on Coastal Processes and LandformsGet your flashcardsBuild my revision planTrack my progress⚠️ Common Misconceptions
Misconception 1: "Longshore drift is a current flowing out to sea."
Longshore drift does not move sediment offshore — it moves it along the coast. The zigzag movement is entirely along the shoreline: swash up the beach at an angle, backwash straight back down. Each wave cycle nudges sediment a little further in the direction of the prevailing wind. Currents moving offshore are a different phenomenon. Confusing them will cost you marks on any question about spits, beaches or coastal management.
Misconception 2: "Headlands form where waves hit hardest."
Headlands form because of geology, not because waves concentrate on them. It is the other way round: hard and soft rocks erode at different rates, creating the bay-and-headland pattern first. Once the headland is formed and sticks out into the sea, then waves concentrate on it due to wave refraction. The initial cause is differential rock resistance, not selective wave attack.
Misconception 3: "Protecting a coast always helps — it cannot make things worse."
This is wrong and it is exactly the kind of thinking that makes Holderness such a valuable case study. Building a sea wall or groynes at one location interrupts the natural flow of sediment along the coast. Beaches downdrift are starved of their sediment supply. Cliffs that were once protected by a wide beach are now exposed. Spits that depend on sediment input from eroding cliffs begin to shrink. Coastal management in one place can and does cause increased erosion and damage elsewhere — this is called the "sediment budget" problem and it is a Level 3 exam point.
Misconception 4: "Attrition erodes cliffs."
Attrition does not act on cliffs. It acts on sediment particles once they have already been eroded and are being transported. Attrition explains why beach pebbles are smooth and round, and why sediment gets finer as you move along a coast in the direction of longshore drift. The processes that actually erode cliffs are hydraulic action, abrasion and solution — not attrition.
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