Erg (landform) Erg (landform) An erg (also sand sea or dune sea, or sand sheet if it lacks dunes) is a broad, flat area of desert covered with wind-swept sand with little or no vegetative cover. The term takes its name from the Arabic word "ʿarq" (), meaning "dune field". Strictly speaking, an erg is defined as a desert area that contains more than of aeolian or wind-blown sand and where sand covers more than 20% of the surface. Smaller areas are known as "dune fields". The largest hot desert in the world, the Sahara, covers and contains several ergs, such as
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