Grand Erg Occidental Grand Erg Occidental The Grand Erg Occidental (, al-ʿIrq al-Gharbī al-Kabīr), (also known as the Western Sand Sea) is the second largest erg in northern Algeria after the Grand Erg Oriental. It covers an area of approximately . The sand dunes in the erg are formed by the wind, and can be up to high. Certain crescent-shaped dunes, known as barchans, are actually mobile; the wind can push these dunes as much as 20 to 30 m (65-100 ft) in one year. It is a desert natural region that receives less than 50 mm (1,96 in) of rainfall per year.
Erg Ferradj elementary schools, with 39 classrooms including 27 in use. There are a total of 1,096 school students. 2.8% of the population has a tertiary education, and another 14.9% has competed secondary education. The overall literacy rate is 71.3%, and is 77.2% among males and 65.3% among females. Erg Ferradj has 2 polyclinics and 2 room care facilities; residents must travel to Abadla or Méchraâ Houari Boumédienne for further medical treatment. Erg Ferradj has 3 operational mosques, with another 1 under construction. The commune is composed of three localities: Erg Ferradj Erg Ferradj () is a town and commune in Abadla