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2002年5月,吉林大学边疆考古研究中心在图们江流域进行考古调查时发现和龙市柳市洞旧石器地点。石制品分布在高出河水面20米的二级阶地上,共获得石制品89件,有石核、石片、石叶、细石叶、刮削器、雕刻器等。该地点的石制品特征可代表该流域的一种工业类型,与周边地区的旧石器有着密切的联系。该地点的地质年代应相当于晚更新世的晚期,旧石器时代的晚期。
In May 2002, the Archeological Research Center of Frontier Archeology, Jilin University, discovered the ancient stone site of Liushi Cave in Helong City during an archaeological survey in the Tumen River Basin. Stone products distributed in 20 meters above the water surface of the second terrace, a total of 89 pieces of stone products, stone, stone, stone, fine stone, scraper, engraving and so on. The stone features at this site represent an industrial type of the basin and are closely linked to the Paleolithic in the surrounding area. The geologic age of the site should correspond to the late Pleistocene and late Palaeolithic.