The Acheulo-Yabrudian complex has three stone-tool traditions, chronologically: the Acheulo-Yabrudian, the Yabrudian and the Pre-Aurignacian or Amudian. The Yabrudian tradition is dominated by thick scrapers shaped by steep Quina retouch; the Acheuleo-Yabrudian contains Yabrudian scrapers and handaxes; and the Pre-Aurignacian/Amudian is dominated by blades and blade-tools.[3]