This PDF file includes:

• Supplementary Materials and Methods
• Table S1. Element, side, and context for the sampled remains.
• Table S2. Enamel ⁸⁷Sr/⁸⁶Sr, δ¹⁸O, and δ¹³C isotope results with data on Sr concentration and carbonate replicates.
• Table S3. Results from sulfur (δ³⁴S) isotope analysis.
• Table S4. Cluster membership based on a rescaled distance of two on the example dendrogram in fig. S1.
• Table S5. Characterization of the clusters in the K = 24 model, showing membership (n) at each site, isotope value ranges, and the maximum distance from the cluster center among members.
• Table S6. Results of K = 24 cluster analysis ordered by sample number, showing cluster membership for each sample and its distance from the cluster centre.
• Table S7. Results of the K = 24 cluster model, showing sample membership for each cluster.
• Table S8. Samples with highly radiogenic (>0.7131) ⁸⁷Sr/⁸⁶Sr values.
• Fig. S1. Example dendrogram output from the hierarchical cluster analysis in SPSS with annotated cluster numbers.

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