Independent age estimates resolve the controversy of ancient human footprints at White Sands.
Independent age estimates resolve the controversy of ancient human footprints at White Sands.
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独立的年龄估计解决了白沙古人类足迹的争议。
DOI：
10.1126/science.adh5007
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Pigati JS
中科院分区：
文献类型：
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作者：
Pigati JS
据报道，根据水生植物川蔓藻种子的放射性碳年代测定，美国新墨西哥州白色沙滩国家公园的人类足迹可以追溯到23,000年至21,000年前。这些年龄仍然存在争议，因为潜在的旧碳库效应可能会影响其准确性。我们提出了新的校准的14 C年龄的陆地花粉收集从相同的地层层位的Ruppiaseeds，沿着的光释光年龄的沉积物内的人类足迹轴承序列，以评估种子年龄的准确性。结果表明，最初建立的年代框架的白色沙滩足迹是强大的，并重申，人类在北美存在于末次盛冰期。
Human footprints at White Sands National Park, New Mexico, USA, reportedly date to between ~23,000 and 21,000 years ago according to radiocarbon dating of seeds from the aquatic plantRuppia cirrhosa. These ages remain controversial because of potential old carbon reservoir effects that could compromise their accuracy. We present new calibrated14C ages of terrestrial pollen collected from the same stratigraphic horizons as those of theRuppiaseeds, along with optically stimulated luminescence ages of sediments from within the human footprint–bearing sequence, to evaluate the veracity of the seed ages. The results show that the chronologic framework originally established for the White Sands footprints is robust and reaffirm that humans were present in North America during the Last Glacial Maximum.