Portstewart strand psammosere case study AS GEOGRAPHY CCEA

Location Portstewart strand NW of NI

 formation of sand dunes sand is deposited on the beach by longshore drift. waves and onshore winds carry material above the high tide line where it is trapped by driftwood/seaweed, pioneer species colonise it to form embryo dunes, they stabilise the sand which encourages more deposition and eventually a sand dune forms.

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