IB Geography: Ecosystems and Human Activity: Psammosere

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  • 1. Sand Dunes
  • 2.
    • Conditions for Dune Formation
    • A plentiful supply of sand.
    • A shallow offshore zone with gentle gradients, where large exposures of sand dry out at low tide.
    • An extensive backshore area where sand can accumulate.
    • Prevailing onshore winds.
    • The growth of vegetation, such as Sea Couch Grass.
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