关键词: 阎家岗遗址; 动物骨骼围圈; 地质背景

Abstract: The Yanjiagang Paleolithic site near Harbin，the capital city of Heilongjiang Province is located on the broad fluvial plain of Songhuajiang, a main river in northeastern China. Excavation during the 1980s defined it as a campsite of Upper Paleolithic hunters, which consists of two semi-circle structures made of bone fragments from animals such as bison, woolly rhinoceros, mammoth, deer, horse, and gazelle. Some researchers, however, have argued that the circles are not artifacts but a result of natural river movement.
A re-examination of the site by the authors reports that Yanjiagang is indeed a campsite of ancient hunters. The artificial nature of the animal bone circle structures does not have any support from the re-examination. The present report corrects the radioactive dating of the site as 14 C cal BP 26957 ± 626, which can be compared with late MIS 3 and is older than the previously published result of 22370 ± 300 BP.

Key words: Yanjiagang; Semi-circle structures; Geology