Macro sample 699

Information

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 Beta-282127, Beta-27804, and Beta-27823), and one of which was a partially charred husk attached to its shank (OS-86020). Because this sample is post-bomb (post-1950), and the husk/shank sample 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 contaminated and the three younger dates to be too recent, but accept the oldest sample, OS-86020, as being valid (Grobman et al. 2011:SI text).

Radiocarbon Date

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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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