Fig. 2. Bayesian chronological model.

Bayesian chronological model of AMS dated peach pits from the Oconee Valley, Georgia (left). This is the primary, simplest model for the timing of peach introduction to the Oconee Valley. All AMS measurements directly on peach pits were incorporated into a single, simple phase model to yield a modeled start date for the arrival of peaches. Individual numbers in parentheses after the sample ID correspond with sites listed in Supplementary Data 1 and presented in Fig. 1A. Alternative models (including expanded, individual site-based models) that yield the same results as the primary model are presented as Supplemental Information. Full methodological details for both the primary and alternative models are included in the methods section below and as Supplementary Information. Photographs of directly dated charred peach pits from archeological sites in the Oconee Valley, Georgia (right). Letters (A–D) are used to signify which dates in the model are associated with the peach pits in each photograph.