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An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body
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 (3)He data for Ordovician sediments show that the breakup took place just at the onset of a major, eustat...
Autores principales: | , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6750910/ https://www.ncbi.nlm.nih.gov/pubmed/31555741 http://dx.doi.org/10.1126/sciadv.aax4184 |
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author | Schmitz, Birger Farley, Kenneth A. Goderis, Steven Heck, Philipp R. Bergström, Stig M. Boschi, Samuele Claeys, Philippe Debaille, Vinciane Dronov, Andrei van Ginneken, Matthias Harper, David A.T. Iqbal, Faisal Friberg, Johan Liao, Shiyong Martin, Ellinor Meier, Matthias M. M. Peucker-Ehrenbrink, Bernhard Soens, Bastien Wieler, Rainer Terfelt, Fredrik |
author_facet | Schmitz, Birger Farley, Kenneth A. Goderis, Steven Heck, Philipp R. Bergström, Stig M. Boschi, Samuele Claeys, Philippe Debaille, Vinciane Dronov, Andrei van Ginneken, Matthias Harper, David A.T. Iqbal, Faisal Friberg, Johan Liao, Shiyong Martin, Ellinor Meier, Matthias M. M. Peucker-Ehrenbrink, Bernhard Soens, Bastien Wieler, Rainer Terfelt, Fredrik |
author_sort | Schmitz, Birger |
collection | PubMed |
description | 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 (3)He 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. |
format | Online Article Text |
id | pubmed-6750910 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-67509102019-09-25 An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body Schmitz, Birger Farley, Kenneth A. Goderis, Steven Heck, Philipp R. Bergström, Stig M. Boschi, Samuele Claeys, Philippe Debaille, Vinciane Dronov, Andrei van Ginneken, Matthias Harper, David A.T. Iqbal, Faisal Friberg, Johan Liao, Shiyong Martin, Ellinor Meier, Matthias M. M. Peucker-Ehrenbrink, Bernhard Soens, Bastien Wieler, Rainer Terfelt, Fredrik Sci Adv Research Articles 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 (3)He 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. American Association for the Advancement of Science 2019-09-18 /pmc/articles/PMC6750910/ /pubmed/31555741 http://dx.doi.org/10.1126/sciadv.aax4184 Text en Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Schmitz, Birger Farley, Kenneth A. Goderis, Steven Heck, Philipp R. Bergström, Stig M. Boschi, Samuele Claeys, Philippe Debaille, Vinciane Dronov, Andrei van Ginneken, Matthias Harper, David A.T. Iqbal, Faisal Friberg, Johan Liao, Shiyong Martin, Ellinor Meier, Matthias M. M. Peucker-Ehrenbrink, Bernhard Soens, Bastien Wieler, Rainer Terfelt, Fredrik An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body |
title | An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body |
title_full | An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body |
title_fullStr | An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body |
title_full_unstemmed | An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body |
title_short | An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body |
title_sort | extraterrestrial trigger for the mid-ordovician ice age: dust from the breakup of the l-chondrite parent body |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6750910/ https://www.ncbi.nlm.nih.gov/pubmed/31555741 http://dx.doi.org/10.1126/sciadv.aax4184 |
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