RADIOCARBON DATES FOR SITES 23LE174 & 23CK302, MISSOURI

Summary

One botanic sample and four sediment samples from site 23CK302 were submitted for AMS radiocarbon dating. A single botanic sample from 23LE174 also was submitted for dating. Although the original intent was to recover microscopic charcoal from all four sediment samples, visual examination of the screened portion of two of the samples revealed the presence of small pieces of coal. Coal cannot be removed from the microscopic charcoal fraction and would have caused the determination of the radiocarbon age to appear much older

than the age of the sediments in these samples. Therefore, the entire fraction larger than 150 microns for samples C44 and C48 were sorted through to recover larger pieces of charcoal for dating. Pollen samples P26 and P27, which were associated with recovery of Zea mays (corn) pollen, did not yield large enough pieces of charcoal to pick out. Therefore, only sample P27 was processed as a microscopic charcoal fraction despite the risk that it contained small quantities of coal. The two botanic specimens, charcoal picked from two of the sediment samples, and the microcharcoal extraction were submitted for radiocarbon dating.

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