File:Eaax4184.full.pdf
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English: The breakup of the L-chondrite parent body in the asteroid belt 466 million years (Ma) ago still delivers almost a third of all meteorites falling on Earth. Our new extraterrestrial chromite and 3He data for Ordovician sediments show that the breakup took place just at the onset of a major, eustatic sea level fall previously attributed to an Ordovician ice age. Shortly after the breakup, the flux to Earth of the most fine-grained, extraterrestrial material increased by three to four orders of magnitude. In the present stratosphere, extraterrestrial dust represents 1% of all the dust and has no climatic significance. Extraordinary amounts of dust in the entire inner solar system during >2 Ma following the L-chondrite breakup cooled Earth and triggered Ordovician icehouse conditions, sea level fall, and major faunal turnovers related to the Great Ordovician Biodiversification Event. |
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https://advances.sciencemag.org/content/5/9/eaax4184 https://doi.org/10.1126/sciadv.aax4184 |
Author | Birger Schmitz, Kenneth A. Farley, Steven Goderis, Philipp R. Heck, Stig M. Bergström, Samuele Boschi, Philippe Claeys, Vinciane Debaille, Andrei Dronov, Matthias van Ginneken, David A.T. Harper, Faisal Iqbal, Johan Friberg, Shiyong Liao, Ellinor Martin, Matthias M. M. Meier, Bernhard Peucker-Ehrenbrink, Bastien Soens, Rainer Wieler and Fredrik Terfelt |
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current | 11:03, 30 September 2019 | 1,237 × 1,575, 11 pages (736 KB) | Pamputt (talk | contribs) | User created page with UploadWizard |
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Short title | Science Journals — AAAS |
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Software used | Adobe InDesign CC 14.0 (Windows) |
Conversion program | Adobe PDF Library 15.0 |
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Page size | 594 x 756 pts |
Version of PDF format | 1.6 |
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