山形県中津川・上屋地の前期旧石器時代の遺跡とその周辺の地形

概要

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1. The Kamiyachi site of early Paleolithic era has been found in the Nakatsugawa valley, southern part of the Yamagata prefecture. There are 6 geomorphological surfaces in this valley, and the site is located on the higher terrace II. This terrace is composed of thick clay or silt layers, nich seem to be lacustrine deposits. In the period of the making of this surface, the Nakatsugawa valley was changed into a lake caused by some landslides.<BR>2. Stone tools discovered from Kamiyachi loc. B are pointed tools (Gongen-yama type), scrapers, knives, proto handaxes, picks, choppers, chopping tools, pebblepoints, hammerstones, disc-cores (Levalloisian type), flakes, amorphous tools etc. This culture, containing Levalloisian technique and “Gongen-yama type pointed tools”, may be correlated to the paleolithic culture of the Middle Loam era in the Kanto district.<BR>3. From the view point of the geomorphological and archeological study, it would be possible to say that the site was formed by the middle of the Würm glacial stage.
東北地理学会の論文