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Item type:Publication, A Paleogenomic Reconstruction of the Deep Population History of the Andes(Cell Press, 2020-05-28)There are many unanswered questions about the population history of the Central and South Central Andes, particularly regarding the impact of large-scale societies, such as the Moche, Wari, Tiwanaku, and Inca. We assembled genome-wide data on 89 individuals dating from ∼9,000-500 years ago (BP), with a particular focus on the period of the rise and fall of state societies. Today's genetic structure began to develop by 5,800 BP, followed by bi-directional gene flow between the North and South Highlands, and between the Highlands and Coast. We detect minimal admixture among neighboring groups between ∼2,000–500 BP, although we do detect cosmopolitanism (people of diverse ancestries living side-by-side) in the heartlands of the Tiwanaku and Inca polities. We also highlight cases of long-range mobility connecting the Andes to Argentina and the Northwest Andes to the Amazon Basin. Video Abstract: [Figure presented] Genome-wide data from 89 ancient humans illuminates the changes to the genetic landscape in the Central Andes over 9,000 years, revealing large-scale gene flow and cosmopolitan societies in the Tiwanaku and Inca polities. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Reconstructing the sequence of an Inca Period (1470-1532 CE) camelid sacrifice at El Pacífico, Peru(Elsevier, 2021-11-26)Animal sacrifice has played an important role as a material expression of the ritual behavior practiced by different societies around the world. In the South American Andes, the ceremonial immolation of llamas is well documented by both ethnohistoric and ethnographic sources. Nevertheless, archaeological evidence of animal sacrifice remains poorly documented. In this paper, we report the burial of two young camelids from El Pacífico, a Formative Period ceremonial site located on the central coast of Peru. AMS radiocarbon dates suggest the ritual sacrifice occurred when the architecture of the site was no longer in use, around the time of the Inca conquest. Based on the presence of cut marks and fly pupae, we suggest that one of the camelids, a yearling llama, was sacrificed by removal of its heart and buried shortly thereafter. Similarly, given the location of cut marks and representation of skeletal parts, we infer that the second camelid was slaughtered for human consumption prior to burial. In accordance with documented Andean rites, archaeological evidence from El Pacifico suggests that practitioners of camelid sacrifice followed a behavioral script following the selection of the animal to its final interment. We hypothesize the costly performance of this ceremony at an ancestral sacred site was part of a social and political strategy for promoting intergroup social cohesion during the arrival of the Incas to the region. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Moche chronology of ancient Peru: Bayesian assessment of radiocarbon dates and ceramic styles from north to south(Elsevier Ltd, 2024-09-01)In the last decade Bayesian analysis of radiocarbon dates has become commonplace for archaeologists grappling with regional chronologies. Here we present Bayesian analysis for radiocarbon dates from Moche cultural contexts from the north coast of Peru with the aim to understand the duration of the phenomenon and to compile all known dates in a single location for future analysis and use. The analysis demonstrates that the long-standing Moche ceramic sequence does not provide a perfect proxy for tracking the timing of all social interactions. However, our results show general agreement with traditional relative Moche chronologies. Finally, our study shows that Moche was a shorter cultural phenomenon than has been previously argued, with the current data indicating that it began between the late 4th and early 6th centuries CE and lasted until the 9th century CE.