An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body

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Science Advances  18 Sep 2019:
Vol. 5, no. 9, eaax4184
DOI: 10.1126/sciadv.aax4184

Article Information

vol. 5 no. 9

Online ISSN: 
  • Received for publication March 21, 2019
  • Accepted for publication August 19, 2019
  • .

Author Information

  1. Birger Schmitz1,*,
  2. Kenneth A. Farley2,
  3. Steven Goderis3,
  4. Philipp R. Heck4,5,
  5. Stig M. Bergström6,
  6. Samuele Boschi1,
  7. Philippe Claeys7,
  8. Vinciane Debaille8,
  9. Andrei Dronov9,10,
  10. Matthias van Ginneken11,
  11. David A.T. Harper12,
  12. Faisal Iqbal1,
  13. Johan Friberg1,
  14. Shiyong Liao13,14,
  15. Ellinor Martin1,
  16. Matthias M. M. Meier15,16,
  17. Bernhard Peucker-Ehrenbrink17,
  18. Bastien Soens7,
  19. Rainer Wieler15 and
  20. Fredrik Terfelt1
  1. 1Astrogeobiology Laboratory, Department of Physics, Lund University, Lund, Sweden.
  2. 2Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA.
  3. 3Department of Chemistry, Vrije Universiteit Brussel, Brussels, Belgium.
  4. 4Robert A. Pritzker Center for Meteoritics and Polar Studies, The Field Museum of Natural History, Chicago, IL, USA.
  5. 5Department of the Geophysical Sciences, The University of Chicago, Chicago, IL, USA.
  6. 6School of Earth Sciences, The Ohio State University, Columbus, OH, USA.
  7. 7Analytical, Environmental, and Geo-Chemistry, Vrije Universiteit Brussel, Brussels, Belgium.
  8. 8Laboratoire G-Time, Université Libre de Bruxelles, Brussels, Belgium.
  9. 9Geological Institute, Russian Academy of Sciences, Moscow, Russia.
  10. 10Institute of Geology and Oil and Gas Technologies, Kazan (Volga Region) Federal University, Kazan, Russia.
  11. 11Royal Belgian Institute of Natural Sciences, Brussels, Belgium.
  12. 12Department of Earth Sciences, Durham University, Durham, UK.
  13. 13Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China.
  14. 14CAS Center for Excellence in Comparative Planetology, Hefei, China.
  15. 15Department of Earth Sciences, ETH Zürich, Zürich, Switzerland.
  16. 16Naturmuseum St. Gallen, St. Gallen, Switzerland.
  17. 17Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, USA.
  1. *Corresponding author. Email: birger.schmitz{at}


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