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Yubetsu technique

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Title: Yubetsu technique  
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Subject: Chalcolithic, Technology, Greene projectile point, Striking platform, Transverse arrowhead
Collection: Lithics
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Yubetsu technique

The Yubetsu technique (湧別技法 Yūbetsu gihō) is a special technique to make microblades, proposed by Japanese scholar Yoshizaki in 1961, based on his finds in some Upper Palaeolithic sites in Hokkaido, Japan, which date from c. 13,000 bp.

The name comes from the Yūbetsu River (湧別川 Yubetsugawa), on the right bank of which the Shirataki (白滝遺跡 Shirataki Iseki) Palaeolithic sites were discovered.

To make microblades by this technique, a large biface is made into a core which looks like a tall carinated scraper. Then one lateral edge of the bifacial core is removed, producing at first a triangular spall. After, more edge removals will produce ski spalls of parallel surfaces.

This technique was also used from Mongolia to Kamchatka Peninsula during the later Pleistocene.

References

  • (Japanese)江坂輝爾, 芹沢長介, 坂詰秀一, 『新日本考古学小辞典』(2005)p416
  • (Japanese)千葉英一, 吉崎昌一, 横山英介, 「湧別技法」 『考古学ジャーナル』(1984)p229
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