Roundhead rock art, Tassili mountains, Algeria. Neolithic? (c. 7000-4600 BCE). Example of Nilo-Saharan rock art. Early Holocene (c. 9th mill. BCE). Images of buffalo, giraffe, elephant in earlier images- this later image includes round-head style and preoccupation with hunter-gatherer activities. Shows evidence of repopulation of Sahara after the Younger Dryas.