Longshore drift and spit formation

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Longshore drift and spit formation

  1. 1. Lesson ObjectivesThis lesson is about longshore drift and how this process creates depositional landforms.By the end of this lesson you will be able to:• Name 3 depositional landforms• Describe longshore drift• Explain how longshore drift forms bars, spits and tombolos
  2. 2. How is sediment transported along the coast?
  3. 3. Longshore Drift (LSD)Draw yourself a diagram of longshore drift.Annotate your diagram to explain how LSD worksUse the following words in your annotations:• Swash• Backwash• Gravity• Right angles• Wind direction
  4. 4. ow are spits formed?
  5. 5. Skills Builder! Draw a sketch of the spit Label the spit, the curved end and the salt marsh Draw an arrow to show the direction of longshore drift Annotate the diagram to explain how the spit has formed and developed
  6. 6. What is a bar? If a spit joins one part of the mainland to another it is called a bar. For example, there is a bar at Orford Ness in Suffolk.
  7. 7. Chesil Beach, Dorset Looking at these pictures do you think Chesil beach is a bar, a tombolo or a spit?

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