ブルガリア前期青銅器時代における縄目文土器の変遷

デャドヴォ遺跡の事例を中心として

抄録

Pottery with cord-impressed decoration is representative of the Early Bronze Age in southeastern Europe. But little attention has been paid to a systematic study of it in terms of typology and provenance analysis. This paper presents the characteristics and the process of the changes using 32 sherds from Dyadovo in Upper Thrace, Bulgaria.
　The first half of this article demonstrates a close correlation between typological traits in form, pattern and decoration. Judging from the stratigraphic context, small bowls decorated with a right-twisted cord appeared earlier than shallow bowls and deep bowls decorated with a left-twisted cord. A comparison of Dyadovo pottery with pottery from surrounding areas reveals that each area had distinctive characteristics. Hence it is concluded that the small bowls were not imported directly from the northwestern Pontic areas to the north, but rather that the method of decoration was diffused.
　The second half of this article shows the results of ceramic petrographic investigations with polarizing and binocular microscopes carried out on these sherds and on about 300 sherds from Dyadovo, and on clay samples collected nearby and on Sveti Iliya Hill, about 5 km away. The analysis demonstrates that most of the shallow bowls and the deep bowls were made of granitoid-derived clay (Type I), and so were local wares. However, it is likely that the flint or jasper in the paste of the small bowls (Type II) came from a zone around the southern foot of Mt. Sliven in Upper Thrace. It is concluded that after the advent of cord-impression decoration in Upper Thrace, the small bowls were made in the Sliven region, some of which were imported to Dyadovo, and thereafter, shallow bowls and deep bowls of local Dyadovo ware came to be decorated with cord impressions until the decline of the settlement.