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Races of preceramic maize cobs from Paredones and Huaca Prieta. (A) Proto-Confite Morocho cob with large soft glumes; the extreme lower right tip of the cob shows the remainder of a partially charred shank fragment (arrow), a portion of which with its attached husk fragment was removed and AMS dated to 6775–6504 cal BP. (B) Confite Chavinense cob exhibiting fasciation and cupules underlying very small kernels. (C) Proto-Alazan cob.
