Macro sample 701


This date is from an uncharred cob recovered from Unit 22, floor 18-3 (Grobman et al. 2011). It is one of five dated samples from the same maize plant, three other portions of which were an uncharred cob (Samples AA-88761, Beta-27804, and Beta-282127), and one of which was a partially charred husk attached to its shank (OS-86020). Because one sample (AA-88761) is post-bomb (post-1950), and one is the earliest dated maize at the site--and, in fact, the earliest dated maize macroremain sample in the Americas--it is likely that all five samples from this same maize plant are contaminated in some way. The excavators, however, consider this sample to be too young, but accept the oldest sample, OS-86020, as being valid (Grobman et al. 2011:SI text).

Radiocarbon Date

Attached Files


References Cited

Grobman, Alexander, Duccio Bonavia, Tom D. Dillehay, Dolores R. Piperno, José Iriarte and Irene Holst
    2011    Preceramic Maize from Paredones and Huaca Prieta, Peru. Proceedings of the National Academy of Sciences, U.S.A. 109(5):1755–1759.


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