Vegetation occurs in dry valleys. Barbary sheep, birds, foxes, gazelles and rabbits live in the valleys, and the Haruj is used as a pasture by Arabs and Tibbus. 4,000 year old petroglyphs in the field show antelopes and cattle. Neolithic stone weapons made out of Haruj rocks have been found and several millstones discovered in the Roman cities of Leptis Magna and Cyrene did originate in the volcanic field.