Abstract
I report 16 new AMS age determinations on short-lived plant materials or ceramic residue from seven Central Plains tradition sites in Kansas and Nebraska. Before showing how these new dates contribute to improving the Central Plains tradition chronology, I assess the accuracy of the dates and provide comments on the effects of sample size on date accuracy, the use of small twigs for dating, and the reliability and accuracy of dates on ceramic residue. The new dates place these sites in the very late thirteenth or the fourteenth century. The new dates from sites in western Kansas and Nebraska, however, cannot yet be compared with previously obtained dates from nearby sites, since most of these previously obtained dates were on wood charcoal. New dates on short-lived remains from these sites are needed.
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