Studying the Chronology and the settlements of Palaeolithic Culture in Chugoku District

1. 冈山县上寺原村翁原遗址的发掘我们于1990年和1991年对翁原遗址1号进行了考古调查和发掘。我们在aira - tanawa火山灰层的上表面发现了新的石头遗迹，这被认为是缺乏任何文化遗迹的层。在此结果中，在Onbara遗址确认存在以下五个文化层：上层为过渡层，软壤土层，Odori火山灰层，aira - tanawa火山灰层和下层包括少量砾石的粘土层。这一数量的文化层被认为是日本西部考古遗址中突出的文化层群。在作为文化层的奥多里层，我们发现了少量的遗存，证实了薄片、岩心和木炭的集中以及有意的石头处理。通过这种水果，我们得到了很好的数据，可以了解石器时代的年代学和旧石器文化的定居点。在发掘出大量文化遗迹的粘土层，我们在1990年和1991年发现了8处新的石质遗迹，15处砾石堆，2处火山灰块。通过对这些砾石堆的详细考察，阐明了砾石、木炭、石态和石残之间的密切关系。中部地区旧石器时代遗址的考古调查我们对一些旧石器时代遗址进行了考古调查：鸟取县Yodoe镇原端遗址；鸟取县关根镇野井遗址；兵库县温泉镇Hataganaru遗址；山口县宇部市附近的旧石器时代遗址。在这些地点，我们调查并记录了其地层和暴露表面的石质遗存分布。石料的地质检验我们对岛根县冲木岛的黑曜石产地进行了考古调查。我们尝试了一些实验来了解石器的制造技术和岩石的细节。

1. THE EXCAVATION OF ONBARA SITE, KAMISAIBARA VILLAGE, OKAYAMA PREFECTUREWe had archaeological investigations and excavations at Onbara site Loc.1 in 1990, 1991. We found newly stone remains at the upper face of Aira-Tanzawa volcanic ash layer which is regarded as the layer lacking any cultural remains. In this result, at Onbara site it is confirmed to exist five cultural layers as follows: a transition layer as upper, a soft loam layer, Odori volcanic ash layer, Aira-Tanzawa volcanic ash layer and a clayish layer including a little gravel as lower. This amount of cultural layers is valued as prominent cultural layers complex among archaeological sites in western Japan. At Odori layer which had as the cultural layer unearthed scanty remains we confirmed concentrations of flakes, cores and of charcoals and intentional stone disposition. In terms of this fruit we got fine data to understand the lithic chronology and settlements of palaeolithic culture. At the clayish layer from which ample cultural remains were unearthed we identified newly 8 concentrations of stone remains, 15 gravel heaps, 2 ash clods in 1990, 1991. Through the detailed examinations of these gravel heaps was practiced, We explicated close relations among gravel, charcoals, stone disposition and stone remains.2. ARCHAEOLOGICAL SURVEY OF PALAEOLITHIC SITES IN CHUGOKU DISTRICTWe had archaeological surveys at some Palaeolithic site as follows: Harabata site, Yodoe Town, Tottori Prefecture; Notsumi site, Sekigane Town, Tottori Prefecture; Hataganaru site, Onsen Town, Hyogo prefecture; Palaeolithic sites around Ube city, Yamaguchi Prefecture. At these sites, we investigated and recorded on its stratigraphy and the distributions of stone remains exposed surface.3. GEOLOGICAL EXAMINATIONS OF STONE MATERIALSWe had a archaeological survey at obsidian source in Oki Island, Shimane Prefecture. And We attempted some experiments to understand the manufacturing technology of stone tools and petrographic details.