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Uniface
In archeology, a uniface is a specific type of stone tool that has been flaked on one surface only. There are two general classes of uniface tools: modified flakes—and formalized tools, which display deliberate, systematic modification of the marginal edges, evidently formed for a specific purpose.
== Modified flakes ==
While many worked stone tools can be technically designated as "modified flakes," for lithic analysis purposes a modified flake is usually defined as a lithic flake with one or more edges that were altered either through opportunistic use or through nonsystematic retouching; it is often difficult to identify the process that produced the observed edge. Opportunistic use occurs when a sharp flake is used as-is, without edge-modification. Nonsystematic retouching occurs when pressure flaking is used to remove a few trimming flakes from the edge, in no discernible or extensive pattern.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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