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• Arthur C. Townsend <br />April 28, 1981 <br />Page Two <br />I have made some additional calculations on the two Early Archaic <br />dates to determine their reliability. Table 1 lists these two samples <br />according to their provenience, reported dates, and the corrected <br />calendrlcal dates. <br />TABLE 1 <br />Dates from 5RT139 <br /> <br />Provenience <br />Sample No. Dates in <br />Years AD Date <br />BP (1950) Calendrical <br />Correction) <br />BP (1950) Calendrical <br />Correction <br />AD <br />Hearth 8 RL-1434 3950 5900 6734 ± 89 4784 ± 200 <br />Feature 11 <br />Hearth 21 RL-1435 4480 6430 7258 ± 89 5308 ± 200 <br />Feature 16 <br />• 1Determined according to procedure outlined by Damon, et al. 1974 <br />The corrected calendrlcal dates were obtained using the dendrochrono- <br />logically calibrated conversion table published by P. E. Damon, et al. <br />(American Antiquity 39(2), 1974). Using these dates and the methods <br />described by Austin Long and Bruce Rippeteau (American Antiquity <br />39(2), 1974), I can calculate an average date for 5RT139 and test the <br />likelihood that the two radiocarbon dates are contemporaneous. <br />Using the following formula, <br />14Ci +_ 6 i <br />n ~- <br />where, <br />14Ci =each of the dates to be averaged <br />n =number of values to average <br />• 6. =single identical sigma value of all the dates <br />dkke. <br />the average correctednfor 5RT139 is <br />