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Ferrimagnetic susceptibility (Xf) for key exposures used in this study below the Prehispanic sites of Charahuén and Pareo (Fig. 1a). Exposure locations shown in Fig. 3. Dashed line indicates the boundary between Hispanic/Prehispanic erosion that was used as one way of correlating exposures. Hispanic erosion is dominated by Charanda parent materials (see Supporting Text).
