Bulbar Scar

The irregularly shaped scar on the bulb of percussion of a struck flint flake. It marks the place where a small piece of flint is dislodged during fracture. The bulbar surface is the surface upon which the bulb of percussion occurs. This fracture pattern is evident by a bruised striking platform at the point of impact with shock waves radiating from it and, on the resultant flake, a bulb of percussion and bulbar scar. When these features are present, it is possible to distinguish human workmanship from natural breakage caused by heat or frost.

İrregularly shaped scar on the bulb of percussion of a struck flint flake. It marks the place where a small piece of flint is dislodged during fracture. The bulbar surface is the surface upon which the bulb of percussion occurs. This fracture pattern is evident by a bruised striking platform at the point of impact with shock waves radiating from it and, on the resultant flake, a bulb of percussion and bulbar scar. When these features are present, it is possible to distinguish human workmanship from natural breakage caused by heat or frost. [bulb scar, eraillure]