Depositional landforms (Edexcel GCSE Geography A): Flashcards
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Depositional landforms
Depositional landforms
Coastal features formed when waves and currents drop sediment
How beaches form
How beaches form
Waves deposit sand and shingle along the shoreline
Cause of curved beaches
Cause of curved beaches
Wave refraction
Sandy beaches wave energy
Sandy beaches wave energy
Lower wave energy environments
Shingle beaches wave energy
Shingle beaches wave energy
Higher wave energy environments
Berms
Berms
Ridges parallel to sea marking different tide levels
Spits
Spits
Narrow ridges of sediment extending from shoreline into sea
Key process for spit formation
Key process for spit formation
Longshore drift
Spit attachment to land
Spit attachment to land
Attached at one end, extends into water at other
Why spits have curved tips
Why spits have curved tips
Secondary winds or wave refraction around spit end
Bars
Bars
Sediment ridges that grow completely across bay mouths
What bars create behind them
What bars create behind them
Lagoons - enclosed/semi-enclosed calm water areas
Difference between spits and bars
Difference between spits and bars
Bars completely close off water; spits open at one end
What longshore drift does
What longshore drift does
Moves sediment along coast in zigzag pattern
Where deposition occurs
Where deposition occurs
Lower wave energy environments