 Obsidian Industry: there was a sustained presence of arrowheads made on bipolar points in all times, but they were out of use in most of the Neolithic sphere by the end of the PPNB, except in Cappadocia and Amuq Region; two production systems can be observed: either a well-controlled production process with specialized workers or people with skills who had knowledge of a standard method, who used a wide range of techniques from shaping the preform up to the débitage of bipolar blades, or shaping of points by covering oblique parallel retouches made by pressure technique; a lot of points were found, in different stages of shaping, some unfinished, unused or heavily used, or with reshaping of the ridges; second system: arrowheads made of coarser, less symmetrical bipolar blades, or tools made on bipolar débitage product waste (e.g. upsilons) --> less professional and more utilitarian production with leftover flakes that were either contemporary or used later on from abandoned workshops on the Göllüdag; inside of the settlement, there were no bipolar cores or product wastes;