MALIKKA (12) 1107

This picture is an attempt to show the coastal sand dunes that form when piled up by wind at the coast. An obstruction such as a big rock in the path of the wind causes it to create eddies and slow down. the wind-blown sand is deposited against the obstruction in the wind shadow. the build up of sand forms a small sand dune. This small sand dune itself acts as an obstruction, causing more wind-blown sand to accumulate in its own shadow. What many people do not know is that there is vegetation(maram) at such areas to help to stabilize them by using their long extensive roots to hold the sand down and cause more sand to accumulate.