Micro sample 309


This is the earliest Zohapilco phase date on charcoal associated with Zea pollen-bearing strata. This date, while not directly associated with pollen, marks the earliest likely date for maize at the site (Layer 17, approx. 3 m below surface) (Niederberger 1979:134). If this Zea pollen represents maize, it is still only slightly larger than teosinte pollen and highlights the difficulty is distinguishing between the two subspecies (teosinte and maize) based on pollen size alone (Piperno et al. 2007).

Radiocarbon Date

Attached Files


References Cited

Niederberger, C.
    1979    Early Sedentary Economy in the Basin of Mexico. Science 203(4376):131-142.

Piperno, D. R., J. E. Moreno, J. Iriarte, I. Holst, M. Lachniet, J. G. Jones, A. J. Ranere and R. Castanzo
    2007    Late Pleistocene and Holocene environmental history of the Iguala Valley, Central Balsas Watershed of Mexico. Proceedings of the National Academy of Sciences USA 104(29):11874-11881.


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