The Uniqueness of the Stone Tool Assemblage from the Hokuto-type Period and What it Tells about Human Activities: With a Special Focus in the Piragaoka Site, Shari Town

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  • 北海道東部の北筒式期における石器群の構造と原料の獲得消費─斜里町ピラガ丘遺跡の分析を中心に─

Abstract

This article discusses the structure of stone tool assemblage and the correlation between procurement and consumption of raw materials by examining obsidian tools from the Piragaoka Site from the Hokuto-type period and comparing the data with other sites from the same period along the Tokoro River. 　The technical analyses of tools demonstrate that points were multifunctional and were not merely used as a hunting tool during the period. Larger points were proved to have been used repeatedly over a long span of time. They were also proved to be manufactured massively in the source area and transported to the middle and lower reaches of the Tokoro River as well as to the Shari Plain where they were consumed. 　With active use of the source area characterized by the mass production of points as well as multi-functionalization and long-term use of larger points being integrally associated, the stone tool assemblage from the Hokuto-type period caused a rapid increase of production and consumption sites respectively in each area. The Piragaoka Site served as a hub for these newly inhabited consumption sites.

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