Nushki is a town in Balochistan, the province of Pakistan. Barkhan dunes are crescent-shaped dunes created by wind action and are common landforms in many parts of the world in sandy deserts. The term barkhan or barchans was introduced by Russian biologist Alexander von Middendorf in 1881 regarding the crescent-shaped dunes found in Turkistan and other desert regions. Barkhans are sickle-shaped and produced by wind action blowing from one direction.