native american petroglyphs - art drawings, estimated to be over 4000 years old, at atlatl rock, valley of fire state park

4000 america american anasazi ancient arid art atlatl aztec canyon chipped desert drawings estimated face faults fire geological illustration indian landmark landscape las mysterious mystic mystical national native natural nature nevada old park patina people petroglyph petroglyphs pictograph prehistoric red rock sandstone shaman spiral spirit state stone symbol trail usa valley vegas years