bulb of percussion

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• bulb of percussion — archeol : a cone shaped bulge on a fractured surface of flint that is made by a blow applied at an angle * * * bulb of percussion A raised cone on a worked flint, marking where a blow was struck • • • Main Entry: ↑bulb bulb of percussion see… …   Useful english dictionary

• Bulb of applied force — In lithic analysis, a subdivision of archaeology, a bulb of applied force (also known as a bulb of percussion or simply bulb of force) is a defining characteristic of a lithic flake. When a flake is detached from its parent core, a portion of the …   Wikipedia

• Lithic reduction — The Levallois technique of flint knapping Lithic reduction involves the use of a hard hammer precursor, such as a hammerstone, a soft hammer fabricator (made of wood, bone or antler), or a wood or antler punch to detach lithic flakes from a lump… …   Wikipedia

• flake tool — a Paleolithic or later stone tool made from a flake struck from a larger core. [1945 50] * * * Stone Age devices, usually flint (see chert and flint), shaped by flaking off small particles or by breaking off a large flake to use as a tool.… …   Universalium

• Conchoidal fracture — Obsidian gives conchoidal fractures Conchoidal fracture describes the way that brittle materials break when they do not follow any natural planes of separation. Materials that break in this way include flint and other fine grained minerals, as… …   Wikipedia

• Clactonian — The Stone Age This box: view · talk · edit ↑ before Homo (Pliocen …   Wikipedia

• Microblade technology — is a period of technological development marked by the creation and use of small stone blades, which are produced by chipping silica rich stones like chert, quartz, or obsidian. Blades are a specialized type of lithic flake that are at least… …   Wikipedia

• Ударный бугорок —     (англ. bulb of percussion, нем. Schlagwulst), выпуклость, появляющаяся при скалывании в верхней части брюшка пластины или отщепа (рис. 112), располагается ниже точки соприкосновения отбойника с ударной площадкой …   Археологический словарь

• conchoid — ˈkäŋˌkȯid, ˈkänˌ also ˈkȯŋˌ noun ( s) Etymology: Greek konchoeidēs, literally, conchlike, from konch conch + oeidēs oid 1. : a plane curve determined as the collection of pairs of points located on converging rays crossing a fixed line or curve …   Useful english dictionary

• Lithic flake — Flakes may be produced by a variety of means. Force may be introduced by direct percussion (striking the core with a percussor such as a rock or antler), indirect percussion (striking the core with an object, sometimes referred to as a punch,… …   Wikipedia

• bulbe — 1. bulbe [ bylb ] n. m. • 1897; angl. bulb « oignon; bulbe » ♦ Mar. Renflement de la partie inférieure de la quille, destiné à diminuer la résistance à l eau. Bulbe d étrave. On trouve aussi bulb (vieilli) . bulbe 2. bulbe [ bylb ] n. m. • XVe;… …   Encyclopédie Universelle