Pyramidal Dune Landscape
Reference work entry
This is a desert landscape consisting of star-shaped or conical sand dunes. A pyramidal dune is a tall sand dune with clear edges and a pyramid shape. This kind of sand dune is a product of sand accumulation by wind from various directions and can be more than 100–200 m high. Pyramidal dunes are common in the northern foothills of Kunlun Mountain and in the centre of the Badain Jaran Desert in China. When the northerly and northwesterly winds blow, the mountains form a barrier, and the airflow forms a large whirlpool that is also subject to the localised influence of the south-westerly wind in front of the mountain. These winds interfere with each other; thus, the wind directions are complex. They blow the sand and eventually deposit it to form pyramidal dunes (Fig. 35).
© Springer Nature Singapore Pte Ltd. 2020