Explanation:
A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface
Answer:
A sand dune is a hill or ridge beyond the reach of the tides, formed from sand sized particles, and may consist of quartz, calcium carbonate, snow, gypsum, or other materials. The upwind/upstream/up-current side of the dune is called the stoss side; the downflow side is called the lee side. Sand is pushed (creep) or bounces ( saltation) up the stoss side, and slides down the lee side.over many years. Dunes usually form in bands parallel to the beach, getting taller and more chaotic the further away you get.
Traveling further from the beach towards the back of the dunes the vegetation starts to change. Over time, the whole system grows while shifting closer to the sea, and if you look at the dunes, you can see each ridge going through the different vegetation phases in turn.
Dune systems can also shrink as a consequence of storm events, rising sea levels or an interruption to the supply of sand.
Explanation:
By their very nature, sand dunes are constantly on the move and change throughout the year. The plants adapt and change along with the moving sand. Eventually, the sand becomes fixed into place and more stable, and organic matter builds up when the plants die and decay.
