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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Evidence from central Mexico supporting the Younger Dryas extraterrestrial impact hypothesis
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Evidence from central Mexico supporting the Younger Dryas extraterrestrial impact hypothesis

机译：来自墨西哥中部的证据支持“年轻树妖”的地外影响假说

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摘要

We report the discovery of unusual materials in a 10-cm-thick layer of sediment obtained from Lake Cuitzeo in central Mexico consistent with extraterrestrial impacts and/or atmospheric airbursts at the onset of Younger Dryas (YD), a geologically brief period of cold climatic conditions and drought, caused by the collapse of the North American Ice Sheets 12,900 y before present (BP). Firestone et al. (1) first reported major abundance peaks in magnetic spherules and carbon spherules within a thin layer (0.5 to <5 cm) called the YD boundary layer (YDB), found across North America and Western Europe. This layer is commonly located beneath a broadly distributed, black, organic-rich layer, called the "black layer." Subsequently, Kennett et al.
机译：我们报道了在墨西哥中部的Cuitzeo湖中获得的10厘米厚的沉积物中发现了异常物质的现象，这与在Younger Dryas（YD）时期（一个短暂的寒冷气候的地质时期）开始时发生的地外影响和/或大气爆发有关条件和干旱，这是由于北美冰原在12900 y以前崩塌造成的（BP）。凡士通等。 （1）首次报道了在北美和西欧发现的称为YD边界层（YDB）的薄层（0.5至<5 cm）内的电磁球和碳球的主要丰度峰值。该层通常位于分布广泛的黑色，富含有机物的层下面，称为“黑色层”。随后，肯尼特等人。

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    Isabel Israde-Alcantara; James L. Bischoff; Gabriela Dominguez-Vazquez; Hong-Chun Li; Paul S. DeCarli; Ted E.Bunch; James H. Wittke; James C. Weaver; Richard B. Firestone; Allen West; James P. Kennett; Chris Mercer; Sujing Xie; Eric K. Richman; Charles R. Kinzie; Wendy S. Wolbach;

  • 作者单位

    Institute de Investigaciones Metalurgkas, Departamento de Geologia y Mineralogia, Universidad Michoacana de San Nicdlas de Hidalgo, C. P. 58060,Morelia, Michoacan, Mexico;

    US Geological Survey, Menlo Park, CA, 94025;

    Facultad de Biologla, Universidad Michoacana de San Nicdlas Hidalgo C. P.58060, Morelia, Michoacan, Mexico;

    Department of Geosciences, National Taiwan University, Taipei 106, Taiwan, Republic of China;

    SRI International,Menlo Park, CA 94025;

    Geology Program, School of Earth Science and Environmental Sustainability, Northern Arizona University, Flagstaff AZ 86011;

    Geology Program, School of Earth Science and Environmental Sustainability, Northern Arizona University, Flagstaff AZ 86011;

    Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138;

    Lawrence Berkeley National Laboratory, Berkeley, CA 94720;

    GeoScience Consulting, Dewey, AZ 86327;

    GeoScience Consulting, Dewey, AZ 86327;

    Department of Earth Science and Marine Science Institute, University of California, Santa Barbara, CA 93106;

    National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan;

    CAMCOR High Resolution and MicroAnalytical Facilities, University of Oregon, Eugene, OR 97403;

    Materials Science Institute, University of Oregon, Eugene, OR 97403;

    Department of Chemistry, DePaul University, Chicago, IL 60614;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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