西沟湾1号旧石器地点位于河北省张家口市怀来县官厅镇珠窝园村,埋藏于永定河右岸第二级阶地后缘。2015年8-9月对该地点进行试掘,揭露面积约27m²,出土232件石制品和19件动物化石。石制品原料以粗面岩为主,应为就地取材;类型包括石核、石片、断块等,标本大小总体以小型为主;石核剥片均采用硬锤锤击法。石制品的类型和技术特征显示其总体属于石片石器技术体系。结合遗物和堆积状况,推测西沟湾1号地点为一处原地埋藏类型的临时性石制品剥片场所。依碳十四年代测定,初步推断该地点的时代为旧石器时代晚期。

The Xigouwan Paleolithic Locality 1(XGW1) is situated in Zhuwoyuan village, Guanting town, Huailai county of Hebei Province. The Paleolithic remains are mainly buried in the second terrace of the right bank of the Yongding River. This Paleolithic locality was excavated from August to September, 2015. The excavation exposed an area of 27 m², and 232 stone artifacts and 19 mammalian fossils were unearthed. Most mammalian fossils consist of burned bones that cannot be identified because of their small size. Although there was no hearth found, many charcoal chips and burned bones unearthed still indicate the use of fire.The lithic assemblage of XGW1 includes cores (n=8; 3.4%), flakes (n=141; 60.8%), chunks (n=68; 29.3%), a hammerstone (n=1; 0.4%) and pebbles (n=14; 6.1%), but there were no retouched pieces found. The general features of these artifacts can be summarized as follows:a) Raw materials for stone knapping are mainly trachyte, accounting for 97.8%, and there is only a small amount of trachyandensite and andesite. Comparative study shows that the local raw materials should have been exploited.b) On the whole, most stone artifacts are small in size, and the micro and medium-sized pieces only account for a certain amount, and large specimens are very few.c) The principle flaking technique was direct hard hammer percussion. Although there are only 8 cores, the overall reduction of these cores is relatively high according to the number of platforms and flaked surfaces, the proportion of remaining cortex, and the platform angles. Most complete flakes were produced from non-cortical platforms, and the relatively high percentage (60%) of type III and VI flakes indicates that many whole flakes represent continuous flaking of the core.The typological and technological characteristics of stone artifacts show that they belong to a flake tool technological system. It can be inferred from the excavation and the analysis of the stone assemblage that XGW1 is most likely a short-term factory site. The AMS Carbon-14 dating results show that XGW1 can be dated to the late Paleolithic (Cal 41997-41186 BP).Located in the northeast of the Nihewan basin, the Huailai basin is an important area and channel for human migration and technological communication during the Pleistocene. However, for a long time, only a few scholars have organized for several Paleolithic archaeological surveys in Huailai basin. Fewer archaeological excavations have been conducted, and so far there have been no related archaeological excavation reports published. The Xigouwan Paleolithic locality 1 is not only an important part of the “Grand Nihewan” archaeology, but the report on its excavation also provides valuable information for the study on technological development and communication, human migration and adaptation in the Yongding river drainage area.