This study obtained calendar dates by radiocarbon accelerator mass spectrometry (14C AMS) dating sequential tree-rings of wooden support posts from the buried remains of traditional Kitkahahki Pawnee earthlodges preserved at an archaeological site on the Central Great Plains, USA. The tree-ring segments from the site were dendrochronologically analyzed prior to this study, but the cross-matched site chronology could not be definitively cross-dated and was thus “floating” in time. Our study represents the first floating tree-ring chronology from the Great Plains to be anchored in time by means of independent radiocarbon analysis. Three specimens were analyzed and dated to 1724–1774 CE (82.0% probability), 1774–1794 CE (95.4% probability), and 1800–1820 CE (95.4% probability). These dates correspond to the hypothetical timing of Kitkahahki ethnogensis, the main phase of village growth in the area, and a later reoccupation during a turbulent period in regional history. The results of this study conform to a scenario in which chaotic social conditions correspond to an increase in residential mobility between the core of Pawnee territory and a southern frontier in the Republican River valley.

中文翻译：

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树环-放射性碳在美国中部大平原上的晚期接触期 KITKAHAHKI PAWNEE 站点约会

本研究通过放射性碳加速器质谱法获得日历日期（14C AMS）从传统的埋葬遗骸中对木制支撑柱的连续树轮进行测年奇特卡哈基保存在美国中部大平原考古遗址的波尼土屋。在这项研究之前，对该地点的年轮片段进行了树木年代学分析，但交叉匹配的地点年表不能确定地交叉年代，因此在时间上是“浮动的”。我们的研究代表了大平原的第一个浮动年轮年表，通过独立的放射性碳分析及时锚定。对三个样本进行了分析，并确定其年代为公元 1724-1774 年（概率为 82.0%）、公元 1774-1794 年（概率为 95.4%）和公元 1800-1820 年（概率为 95.4%）。这些日期对应于假设的时间奇特卡哈基民族起源，该地区村庄发展的主要阶段，以及后来在区域历史动荡时期的重新占领。本研究的结果符合这样一种情况，即混乱的社会条件对应于波尼地区核心和共和河谷南部边境之间住宅流动性的增加。