A complex  of open-air paleontological and   archaeological sites formed in a sedimentary context of fluvial-lagoon  origin  during  the  end  of  the  Pliocene,  Pleistocene and Holocene.

The most important sites are:

• Ain Boucherit Units P/Q y R
• Ain Hanech
• El-Kherba
• El-Kherba- Puits
• Oued El-Attach
• Meheb Errih

These  sites  contain  fossil  remains  from  a  wide  variety  of  savanna  animals  such    as    elephants,    hippopotamuses,    rhinoceroses, equids,  various  bovids  and  carnivores;  as  well  as  stone  artefacts with a chronology extending from 2.2 million to 6,000  years  ago,  bearing  witness  to  continuous  human occupations, including: Oldowan (2.2-1.7 million years), Acheulean (1.6 million years), Middle Paleolithic (50,000 years)  and  Capsian  (10,000-6,000  years).  The  Oldowan  levels represent the oldest human occupations of North Africa.