Uruguai 1 is a recently discovered site in the Foz do Chapecó Archaeological Area, which contains an exceptional archaeological record, documenting the expansion of Homo sapiens in southern Brazil, within the Rio de la Plata basin. The aim of this paper is to present the results of field investigations within sector 1 of the site, providing a detailed description of the entire stratigraphic sequence that spans the Pleistocene-Holocene transition to the present day. The site comprises a variety of archaeological evidence including six archaeological levels (palaeosurfaces), evidenced by lithic tools, charcoal horizons, combustion features, small faunal remains and, for the youngest one, ceramic fragments. The overlapping of six archaeological levels in an open-air stratigraphic context is unprecedented in inland of southern Brazil and provides evidence for a long-term human presence in the area, which is of great archaeological importance in the southern part of South America..

Uruguai 1 是最近在 Foz do Chapecó 考古区发现的遗址，该遗址包含一个特殊的考古记录，记录了智人的扩张在巴西南部拉普拉塔河盆地内。本文的目的是展示场地 1 区的实地调查结果，详细描述从更新世-全新世过渡到现在的整个地层序列。该遗址包括各种考古证据，包括六个考古层次（古表面），由石器工具、木炭层、燃烧特征、小型动物遗骸和最年轻的陶瓷碎片证明。在露天地层背景下，六个考古层次的重叠在巴西南部内陆是前所未有的，并且为该地区长期存在人类提供了证据，这在南美洲南部具有重要的考古意义。