On the South-Eastern side of the ridge sit six caves. The 80 m (260 ft) long cave GLD1 lying 507 m (1,663 ft) above sea level was first excavated during the 1920s by de Beaumais and Royer.[2] Deposits of human occupation were identified and due to the discovery of a set of polished stone tools the site was associated with the early Neolithic although without chrono-stratigraphic analysis and without regard for the regional cultural context at the time.[3][4] Only since 2010, when excavations resumed by CNRPAH (National Center of prehistoric anthropological and historical research in Algiers) was the regional process of "Neolithisation" investigated methodically. First reflected in the results of the zooarchaeological analysis of the macro-mammals as a shift in the management of the livestock herds takes place from mere production of meat towards the production of meat and the use of secondary products.[5]