sand dunes

• types of sand dunes

  • embryo
  • fore
  • yellow
  • grey
  • dune slack
  • mature
• why does sand dunes need a large tidal range to form?

  so there's enough time for sand to dry before tide comes in again
• why do sand dunes need onshore winds to form?

  so sand can be moved to the back of the beach
• what plants need to colonise sanddunes to be stablised?

  marram grass
• how is sand deposited to sand dunes?

  longshore drift
• why does vegetation need to colonise sand dunes?

  because marram grass roots bind sand together and causing it to accumulate - stabalising sand dune and encouraging growth of embryo dunes