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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]
Word: B_____ ___r
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