3 Nisan 2015 Cuma


BLADE: A long, narrow, sharp-edged, thin flake of stone, used especially as a tool in prehistoric times. This flake was detached by striking from a prepared core, often with a hammer. Its length is usually at least twice the width. The blade may be a tool in itself, or may be the blank from which a two-edged knife, burin, or spokeshave was manufactured. This term, then, is used by archaeologists in several ways. (1) It can refer to a fragment of stone removed from a parent core. The blade is used to manufacture artifacts in what is known as the blade and core industry. (2) That portion of an artifact, usually a projectile point or a knife, beyond the base or tang. (3) In certain cultures, small artifacts are called microblades. It was a great technological advance when it was discovered that a knapper could make more than one tool from a chunk of stone. The Châtelperronian and Aurignacian were the earliest of the known blade cultures – associated with the arrival of modern humans. Industries in which many of the tools are made from blades became prominent at the start of the Upper Paleolithic period. A typical blade has parallel sides and regular scars running down its back parallel with the sides. A “backed blade” is a blade with one edge blunted by the removal of tiny flakes. Blades led to another invention – the handle. A handle made it easier and much safer to manipulate a sharp, two-edged blade. [blade tool]
Aurignacian blade

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