elephant and men- cave paintings and petroglyphs at boumediene ,tassili najjer national park, algeria

abstract acacus africa ajjer akakus algeria algerie animal arid boumediene bull carving colorful desert djanet dry elephant erg formation geology hamada heat heritage human illizi mammal man men mountain najjer national nature noires orange outdoor parietal park pattern petroglyph reg rock sahara sculpture shadow stone tadrart tamezguida tassili texture unesco