Ancient Maize Map

Information

ID: 415
Other ID: GX-7430
Type: MicroSample
Subtype: phytolith
Site: Real Alto
Depositional context: house

This date taken from charcoal in Structure 1 is associated with Valdivia Phase 3 and is estimated to be contemporaneous with Structure 20 where phytoliths and starch were recovered from grinding stone tools (see Tables 2 and 3 in Pearsall et al. 2004; Pearsall 1978; Zarrillo et al. 2008).

Radiocarbon Date

Lab number: GX-7430
Dating method: conventional
Directly dated: No
Dated material: charcoal
Contaminated?: No
Lower cal BP (years): 4838
Median cal BP (years): 4191
Upper cal BP (years): 3583
Uncal BP (years): 3845
± 1 σ (years): 240
δ13C:

Attached Files

References Cited

Pearsall, D. M.
1978 Phytolith Analysis of Archeological Soils: Evidence for Maize Cultivation in Formative Ecuador. Science 199(4325):177-178.

Pearsall, D. M., K. Chandler-Ezell and J. A. Zeidler
2004 Maize in Ancient Ecuador: Results from Residue Analysis of Stone Tools from the Real Alto Site. Journal of Anthropological Science 31:423-442.

Zarrillo, S., D. M. Pearsall, J. S. Raymond, M. A. Tisdale and D. J. Quon
2008 Directly dated starch residues document early formative maize (Zea mays L.) in tropical Ecuador. Proceedings of the National Academy of Sciences, USA 105(13):5006–5011.

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