Emergence and Development of Pottery in the Andean Early Formative Period: New Insights from an Improved Wairajirca Pottery Chronology at the Jancao Site in the Huánuco Region, Peru

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