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OxCal (54) plot of calibrated AMS carbon 14 dates from Trench A in mound M1 (five dates in stratigraphic succession) and in three 1 × 1-m excavation probes; charcoal, red dates (catalog numbers with asterisks); seeds, green dates (Materials and Methods and Fig. 2; wiggle-matching curve of the carbon 14 dates in SI Appendix, Fig. S4). See also ref. 55.
