德克萨斯大学奥斯汀分校的研究人员通过对锆石晶体进行U-Pb测年，确定俄克拉荷马州埃姆斯陨石撞击坑的形成时间约为3.7亿年前的晚泥盆纪，比之前的科学认识晚近1亿年1。此前的研究推断该撞击坑形成于约4.675亿年前的奥陶纪1。
新确定的撞击时间与约3.72亿年前发生的弗拉斯尼-法门尼大灭绝事件相近，该事件造成了大量海洋生物的灭绝1。这表明埃姆斯撞击坑与奥陶纪陨石事件无关，而是与这场重大生物灭绝事件时间相符1。
论文由伊丽莎白·卡特洛斯领导的研究团队完成，于2026年7月发表在《陨石学与行星科学》期刊上1。该研究项目由已故研究生安德鲁·帕里西发起，他在2018年毕业1。
Researchers at the University of Texas at Austin have determined that the Ames impact crater in Oklahoma formed approximately 370 million years ago during the Late Devonian period, rather than the previously accepted age of 467.5 million years ago in the Ordovician period—a correction of nearly 100 million years 1. The team, led by Elizabeth Catlos, used uranium-lead dating of zircon crystals to establish this revised timeline with greater precision 1.
This finding has significant implications for understanding the crater's geological context. The impact now aligns chronologically with the Frasnian-Famennian extinction event, which occurred around 372 million years ago and resulted in the loss of numerous marine species, rather than being associated with Ordovician meteorite events as previously thought 1. The research, published in July 2026 in Meteoritics & Planetary Science, was initiated by the late graduate student Andrew Parisi, who graduated in 2018 1.
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