IB Geography: Ecosystems and Human Activity: Psammosere

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IB Geography: Ecosystems and Human Activity: Psammosere

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

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