Spits and Bars

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  • Spits and Bars
    • formed by longshore drift
    • Spits
      • 1) form at sharp bends in coastline e.g river mouth
      • 2) LD transports sand + shingle past bend and deposits in sea
      • 3) strong winds and waves curve end of spit (forms recurved end)
      • 4) sheltered area behind spit is protected from waves
        • material gathers in area, plants can grow there
      • 5) over time sheltered area becomes mud flat or salt marsh
    • Bars
      • 1) formed when spit joins two headlands together
      • 2) bar cuts off bay between headlands from the sea
      • 3) means a lagoon can form behind bar


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