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Archaeologists report coca leaves associated with sacrificed llamas and guinea pigs at Tambo Viejo, an Inka provincial center in Peru’s Acarí Valley. A 2026 preprint gives a more detailed, but not yet peer-reviewed, account in which coca leaves were scattered over nine young llamas. The evidence supports a ritual use for coca at the site, while the precise meaning of the offering and how the llamas died remain interpretations.
What did archaeologists find at Tambo Viejo?
Tambo Viejo was an Inka provincial center in the Acarí Valley on Peru’s south coast. A 2026 article in Ñawpa Pacha reports coca leaves in association with llama and guinea-pig sacrifices, interpreting the finds as evidence that coca played an important role in Inka ritual. The publisher-indexed abstract is the available basis for that report: the article’s abstract and publication record.
The more vivid description comes from a separate July 2026 preprint, not from details established in the journal abstract. It describes nine young llamas placed in a prepared pit, adorned with colorful tassels and necklaces, with coca leaves and fragments of Spondylus shell scattered over them. The preprint also reports clean sand over the animals and a fire lit in a central location. These specifics should be understood as the preprint’s account rather than as independently confirmed details in the journal article: the July 2026 preprint.
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The findings place coca in a ritual setting, but they do not establish exactly what the leaves meant to participants or how they were used during the ceremony. The 2026 journal article interprets the association with animal sacrifices as evidence of coca’s importance in Inka ritual activity; a more specific symbolic meaning is not established by the reported evidence.
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Earlier research on llama offerings at Tambo Viejo offers broader context. A peer-reviewed 2020 study argues that dedicatory animal sacrifice helped establish the center and materialize Inka imperial ideology, legitimizing Inka presence in a conquered location. That is the researchers’ interpretation of the offerings’ political and social role, not a directly observable fact about the participants’ intentions: the 2020 study in Antiquity.
How were the llamas sacrificed?
The preprint suggests the llamas may have been buried alive and died by suffocation because it reports no lethal cut trauma. That is a proposed explanation, not a certain forensic conclusion. The same account reports a fire at the burial location but indicates that the animals themselves appear not to have been burned. The presence of a fire should not be taken as evidence that the llamas were burned.
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Was coca used only in offerings?
No. Separate 2026 excavation work at Tambo Viejo found coca leaves and seeds in a small rectangular, semisubterranean storage feature mixed with clean sand. The excavator proposes that the sand helped preserve the leaves. This storage evidence shows that coca had a practical context at the site as well as its reported association with offerings: the 2026 article in Latin American Antiquity.
The ritual and storage finds should not be conflated: they come from separate contexts and support different interpretations. Together, they indicate that coca was present at Tambo Viejo beyond the animal-offering deposit, but they do not establish how common either practice was across the Inka world.
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What the evidence can—and cannot—show
- Reported archaeological association: The 2026 journal abstract connects coca leaves with llama and guinea-pig sacrifices at Tambo Viejo.
- More detailed but preliminary description: The account of nine young llamas and coca scattered over them is from a 2026 preprint.
- Interpretation rather than certainty: The proposed suffocation and the political or ritual meanings are researchers’ explanations of the evidence, not directly observed events.
- Other context: A separate storage feature contained coca leaves and seeds, so coca’s role at the site was not limited to animal offerings.
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