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    Depositionfeatures Depositionfeatures Presentation Transcript

    • Review What’s going to happen to the ball? Why? Erosion features – Add a feature to the diagram on the board and explain it as you go.
    • Lesson Objectives
      • To be able to define and describe different coastal depositional features .
      • To be able to explain how these coastal features have been created by deposition.
      • WHY? So next time you’re lying on a beach getting a tan, you’ll understand why you’re lying on sand rather than rocks!
    • Beach – Holderness, Yorkshire
    • Beaches
      • A collected body of material (sand, shingle etc.) that has built up between the high and low tide mark.
    • Spit - Spurn Head, Humber Estuary
    • Spits
      • Spits are long narrow ridges of sand and shingle which project from the coastline into the sea.
    • Bar - Slapton Sands, Devon
    • Bars
      • A collected body of material (sand, shingle etc.) that connects two sides of a bay, joining two headlands.
    • Tombolo – Chesil Beach, Dorset
    • Tombolos.
      • A collected body of material (sand, shingle etc.) that connects land to an offshore island
    • Beaches
    • How do Beaches Form?
      • Beaches are one of the most common features of a coastline. Beaches are made up of eroded material that has been transported from elsewhere and deposited here by the sea.
      • Constructive waves help to build up beaches. The type of material found on a beach (i.e. sand or shingle) is influenced by the geology of the area and wave energy.
      • Material from long-shore drift builds up on the beach
      Task: Write in your own words
    • Spits
    • How do spits form?
    • How do Bars Form?
      • These form in the same way as a spit initially but bars are created where a spit grows across a bay, joining two headlands. Behind the bar, a lagoon is created, where water has been trapped and the lagoon may gradually be infilled as a salt marsh develops due to it being a low energy zone, which encourages deposition.
    • Bars
    • How do tombolos form?
      • Tombolos are formed where a spit continues to grow outwards joining land to an offshore island.
    • Tombolos
    • Homework
      • Locate and find pictures of a:
      • Beach
      • Spit
      • Bar
      • Tombolo
      • Label and stick them in your exercise books