Advanced

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

Schmitz, Birger LU ; Farley, Kenneth A.; Goderis, Steven; Heck, Philipp R.; Bergström, Stig M.; Boschi, Samuele LU ; Claeys, Philippe; Debaille, Vinciane; Dronov, Andrei and van Ginneken, Matthias, et al. (2019) In Science Advances 5(9).
Abstract

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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science Advances
volume
5
issue
9
publisher
American Association for the Advancement of Science (AAAS)
external identifiers
  • scopus:85072309122
ISSN
2375-2548
DOI
10.1126/sciadv.aax4184
language
English
LU publication?
yes
id
a8d93fbd-25f4-47b8-be2b-9022b5d65ca9
date added to LUP
2019-09-30 14:32:26
date last changed
2019-11-10 05:19:43
@article{a8d93fbd-25f4-47b8-be2b-9022b5d65ca9,
  abstract     = {<p>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 <sup>3</sup>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 &gt;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.</p>},
  articleno    = {eaax4184},
  author       = {Schmitz, Birger and Farley, Kenneth A. and Goderis, Steven and Heck, Philipp R. and Bergström, Stig M. and Boschi, Samuele and Claeys, Philippe and Debaille, Vinciane and Dronov, Andrei and van Ginneken, Matthias and Harper, David A.T. and Iqbal, Faisal and Friberg, Johan and Liao, Shiyong and Martin, Ellinor and Meier, Matthias M.M. and Peucker-Ehrenbrink, Bernhard and Soens, Bastien and Wieler, Rainer and Terfelt, Fredrik},
  issn         = {2375-2548},
  language     = {eng},
  month        = {09},
  number       = {9},
  publisher    = {American Association for the Advancement of Science (AAAS)},
  series       = {Science Advances},
  title        = {An extraterrestrial trigger for the mid-Ordovician ice age : Dust from the breakup of the L-chondrite parent body},
  url          = {http://dx.doi.org/10.1126/sciadv.aax4184},
  volume       = {5},
  year         = {2019},
}