This article presents a high-resolution chronology of Wairajirca pottery in the Huánuco basin, which has been identified as a frontier region between the Andean highlands and the Amazonian rain forests: its pottery is known for having mixed features from both areas. However, the lack of fine-grained pottery and radiocarbon datasets has handicapped comparative studies’ attempts to track in detail its early development process. Our new high-resolution chronology of Wairajirca pottery is based on stratigraphic excavation data, a detailed ceramic typology, and a Bayesian analysis of the radiocarbon date from the Jancao site. The five-staged ceramic sequence from the late eighteenth to late twelfth century cal BC displays specific features of this development, including radical changes in vessel type over several centuries and connections with other pottery traditions. The earliest phase shows close relation with highlands traditions, whereas the influence of tropical rain forest patterns intensified in later phases alongside the continuation of local pottery traditions. This indicates that frontier dynamics based on fluid interactions across different ecological zones and regional sociopolitical movements played a crucial role in this long-term social process.

中文翻译：

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安第斯早期形成时期陶器的出现和发展：秘鲁瓦努科地区 Jancao 遗址改进 Wirajirca 陶器年代学的新见解

本文介绍了 Huánuco 盆地 Wirajirca 陶器的高分辨率年表，该盆地已被确定为安第斯高地和亚马逊雨林之间的边境地区：其陶器以具有来自这两个地区的混合特征而闻名。然而，缺乏细粒度的陶器和放射性碳数据集阻碍了比较研究详细追踪其早期发展过程的尝试。我们新的 Wirajirca 陶器高分辨率年表基于地层挖掘数据、详细的陶瓷类型学以及对 Jancao 遗址放射性碳年代的贝叶斯分析。从公元前 18 世纪晚期到 12 世纪晚期的五阶段陶瓷序列展示了这一发展的具体特征，包括几个世纪以来容器类型的根本变化以及与其他陶器传统的联系。最早的阶段与高地传统密切相关，而随着当地陶器传统的延续，热带雨林模式的影响在后期得到加强。这表明基于不同生态区和区域社会政治运动的流体相互作用的前沿动态在这一长期社会过程中发挥了至关重要的作用。