Ancient Maize Map

Information

ID: 417
Other ID: Beta-198623
Type: MicroSample
Subtype: starch grain
Site: Loma Alta
Depositional context: midden

Starch granules (10) recovered from a cooking-pot (FS1016, sample 13). The AMS date was made directly on the organic residues adhering to the sherd and in which the starch grains were embedded (Zarrillo et al. 2008:5008).

Radiocarbon Date

Lab number: Beta-198623
Dating method: AMS
Directly dated: Yes
Dated material: organic residue on pottery
Contaminated?: No
Lower cal BP (years): 5279
Median cal BP (years): 5001
Upper cal BP (years): 4861
Uncal BP (years): 4470
± 1 σ (years): 40
δ13C:

Attached Files

"Maize starch granule recovered from charred interior residues of pottery (FS1016, sample 13) under polarized (A) and cross-polarized (B) light showing strong birefringence and excellent preservation. (Scale bar, 20 μm.)" (Zarrillo et al. 2008:5008).

References Cited

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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