The engravings are located near dwelling sites, shown by the presence of worked flints and debitage, "stratified in various levels or at the foot of cliffs of reddish sandstone, the patina of which can become nearly black, which run along the djebels or stand at the edges of the oueds." They are "by-and-large arranged in little separate groups", the monumental friezes or very richly decorated murals like those of Oued el Hesbaïa or Aïn Naga being "exceptions".