(View exact match)burin spallCATEGORY: lithics
DEFINITION: A small, relatively thick flake removed from a flake or blade using a snapped termination or previous burination scar as a platform.cortical spallCATEGORY: artifact
DEFINITION: A flake struck from the surface of a pebble or nodule which retains the natural cortex on one face. A cortical spall tool is generally a relatively large ovate cortical spall exhibiting retouch or use-wear on one or more edges.spallCATEGORY: lithics
DEFINITION: The small, usually long and thin flint piece removed from a burin.thermal spallCATEGORY: ceramics
DEFINITION: The small shallow rounded pits removed from pottery due to high heat and escaping moisture - often on rims of cooking pots.
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DEFINITION: Late Palaeolithic microlithic industry of Hokkaido, Japan, dated c 13,000 bp. Obsidian was worked in the Shirataki technique: a bifacial core has one lateral edge removed, producing a triangular spall. More edge removals make ski spalls of parallel surfaces. The technique was used from Mongolia to Alaska in the later Pleistocene.burin facetCATEGORY: artifact
DEFINITION: The scar formed by the detachment of a burin spallconchoidal flakeCATEGORY: artifact
DEFINITION: A type of spall resulting from the fracture of fine-grained, or glassy rocks. Characterized by a bulb of percussion, striking platform remnant, and extremely sharp edges. A predictable fracture pattern that allows the manufacture of Pre-determined tools from these materials.retouchSYNONYMS OR RELATED TERMS: secondary working; secondary flaking
DEFINITION: The working of a primary flake, usually by the removal of small fragments, to form a tool; to thin, sharpen, straighten, or otherwise refine an existing stone tool for further use. It is the work done to a flint implement after its preliminary roughing-out in order to make it into a functional tool. In the case of a core-tool, such as a hand-ax, retouch may consist of roughly trimming the edge by striking with a hammerstone, but on smaller, finer flake or blade tools it is usually carried out by pressure-flaking. It is done two ways, either by blows that knock small flakes off an edge (percussion retouch) or by pressure to force the flakes off (pressure retouch). The different types of retouch are also described as: backing or blunting retouch, and invasive or normal retouch. Invasive retouch can be steep or shallow, depending mainly on the kind of edge being retouched; this retouch can also be scaly in character. Backing is most often applied to blades and may have been done to blunt the back or to bring its end to a stout point. Evidence suggests that it may have been done to regularize the blade edge to facilitate fixing by resin 'mastic' to a bone or wood shaft. Such a strip of mastic was found in Lascaux, France. Notching or toothing is another form of retouch, and the removal of spalls or slivers as in the burin technique could be regarded as a further form of retouch or modification. Retouch is one of the most obvious features distinguishing a manmade from a naturally struck flint.