Teotihuacan is one of the most studied archaeological sites in Mesoamerica because of its exceptional size and urban planning; however, its last years of occupation and abandonment are still under debate. We report a high-resolution chronology for the Xalla complex integrating archaeomagnetic dates, radiocarbon (14C) ages, and detailed archaeological information about sample type and context in a Bayesian model. The model includes 42 14C ages and 7 archaeomagnetic dates grouped in 6 phases, including samples from collapsed roofs with 14C ages earlier than expected, suggesting a problem of inbuilt age. The archaeomagnetic dates on lime plasters were classified in unburned samples, related to the time of construction, and burned samples, related to the Big Fire associated to the abandonment of Teotihuacan. The modeled 14C ages resulted in shorter intervals, with the possibility of differentiating the construction phases, confirming that big beams had inbuilt age. Further, combining the two dating methods and classifying lime plaster samples in burned and unburned, it was possible to date different events within the same archaeological context. It is concluded that by combining these two dating methods and understanding the moment that each sample is dating, it is possible to obtain solid and precise chronologies.

中文翻译：

---

墨西哥特奥蒂瓦坎 XALLA 宫殿建筑群的高分辨率年表，在贝叶斯模型中结合放射性碳年龄和考古磁性年代

特奥蒂瓦坎因其独特的规模和城市规划而成为中美洲研究最多的考古遗址之一；然而，它最后几年的占领和遗弃仍在辩论中。我们报告了 Xalla 复合体的高分辨率年表，该复合体整合了考古磁日期、放射性碳（14C) 年龄，以及有关贝叶斯模型中样本类型和背景的详细考古信息。该模型包括 4214C 年龄和 7 个考古磁日期分为 6 个阶段，包括来自倒塌屋顶的样本14C 比预期更早老化，表明存在内置年龄问题。石灰灰泥上的考古磁日期分为未燃烧样品，与施工时间有关，燃烧样品与与特奥蒂瓦坎废弃相关的大火有关。建模的14C 年龄导致更短的间隔，有可能区分施工阶段，确认大梁具有内置年龄。此外，结合这两种测年方法并将石灰石膏样品分类为燃烧和未燃烧的样品，可以在同一考古背景下确定不同事件的年代。得出的结论是，通过结合这两种测年方法，了解每个样本测年的时刻，可以获得可靠而精确的年表。