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A late Palaeolithic tradition of obsidian working in Japan dating from c.11 000 bc; also known as the Shirataki technique after the type‐site at Shirataki‐Hattoridai, Japan. The method of working was used widely from Mongolia to Alaska and involved a bifacial core which was then turned into a wedge‐shaped core by flaking off one lateral edge.

Subjects: Archaeology.

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