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The galactic cycle of extinction

  • Michael Gillman (a1) and Hilary Erenler (a1)

Global extinction and geological events have previously been linked with galactic events such as spiral arm crossings and galactic plane oscillation. The expectation that these are repeating predictable events has led to studies of periodicity in a wide set of biological, geological and climatic phenomena. Using data on carbon isotope excursions, large igneous provinces and impact craters, we identify three time zones of high geological activity which relate to the timings of the passage of the Solar System through the spiral arms. These zones are shown to include a significantly large proportion of high extinction periods. The mass extinction events at the ends of the Ordovician, Permian and Cretaceous occur in the first zone, which contains the predicted midpoints of the spiral arms. The start of the Cambrian, end of the Devonian and end of the Triassic occur in the second zone. The pattern of extinction timing in relation to spiral arm structure is supported by the positions of the superchrons and the predicted speed of the spiral arms. The passage times through an arm are simple multiples of published results on impact and fossil record periodicity and galactic plane half-periods. The total estimated passage time through four arms is 703.8 Myr. The repetition of extinction events at the same points in different spiral arm crossings suggests a common underlying galactic cause of mass extinctions, mediated through galactic effects on geological, solar and extra-solar processes. The two largest impact craters (Sudbury and Vredefort), predicted to have occurred during the early part of the first zone, extend the possible pattern to more than 2000 million years ago.

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Bambach R.K. (2006). Phanerozoic biodiversity mass extinctions. Ann. Rev. Earth Planet. Sci. 34, 127155.
Bienayme O., Soubiran C., Mishenina T.V., Kovtyukh V.V. & Siebert A. (2006). Vertical distribution of Galactic disk stars – III. The Galactic disk surface mass density from red clump giants. Astron. Astrophys. 446, 933942.
Gies D.R. & Helsel J.W. (2005). Ice age epochs and the Sun's path through the Galaxy. Astrophys. J. 626, 844848.
Goncharov G.N. & Orlov V.V. (2003). Global repeating events in the history of the Earth and the motion of the Sun in the Galaxy. Astron. Reports 47, 925933.
Haq B.U., Hardenbol J. & Vail P. (1987). Chronology of fluctuating sea levels since the Triassic. Science 235, 11561167.
Isley A.E. & Abbott D.H. (2002). Implications of the temporal distribution of high-Mg magma for mantle plume volcanism through time. J. Geology 110, 141158.
Jaeger J.-J. & Hartenberger J.-L. (1989). Diversification and extinction patterns among Neogene perimediterranean mammals. Phil. Trans. R. Soc. Lond. B. 325, 401420.
Kaufman A.J., Corsetti F.A. & Varni M.A. (2007). The effect of rising atmospheric oxygen on carbon and sulphur isotope anomalies in the Neoproterozoic Johnnie Formation, Death Valley, U.S.A. Chemical Geology, 237, 4763.
Kemp D.B., Coe A.L., Cohen A.S. & Schwark L. (2005). Astronomical pacing of methane release in the Early Jurassic period. Nature 437, 396399.
Leitch E.M. & Vasisht G. (1998). Mass extinctions and the Sun's encounters with spiral arms. New Astronomy 3, 5156.
Lewis A.R., Marchant D.R., Ashworth A.C., Hemming S.R. & Machlus M.L. (2007). Major middle Miocene global climate change: evidence from East Antarctica and the Transantarctic mountains. GSA Bulletin 119, 14491460.
Marcos de la Fuente R. & Marcos de la Fuente C. (2004). On the correlation between the recent star formation rate in the Solar Neighbourhood and the glaciation period record on Earth. New Astronomy 10, 5366.
Medvedev M.V. & Melott A.L. (2007). Do extragalactic cosmic rays induce cycles in fossil diversity? Astrophys. J. 664, 879889.
Naoz S. & Shaviv N.J. (2007). Open cluster birth analysis and multiple spiral arm sets in the Milky Way. New Astronomy 12, 410421.
Napier W.M. (2006). Evidence for cometary bombardment episodes. Mon. Not. R. Astron. Soc. 366, 977982.
Nurmi P., Valtonen M.J. & Zheng J.Q. (2001). Periodic variation of Oort cloud flux and cometary impacts on the Earth and Jupiter. Mon. Not. R. Astron. Soc. 327, 13671376.
Pavlov V. & Gallet Y. (2005). A third superchron during the early Paleozoic. Episodes 28, 7884.
Prokoph A., Ernst R.E. and Buchan K.L. (2004). Time series analysis of large igneous provinces: 3500 Ma to present. J. Geology 112, 122.
Rampino M.R. & Stothers R.B. (1984a). Terrestrial mass extinctions, cometary impacts and the Sun's motion perpendicular to the Galactic plane. Nature 308, 709712.
Rampino M.R. & Stothers R.B. (1984b). Geological rhythms and cometary impacts. Science 226, 14271431.
Rampino M.R. & Stothers R.B. (1988). Flood basalt volcanism during the past 250 million years. Science 241, 663668.
Raup D.M. & Sepkoski J.J. (1982). Mass extinctions in the marine fossil record. Science 215, 15011503.
Raup D.M. & Sepkoski J.J. (1984). Periodicity of extinctions in the geological past. Proc. Natl. Acad. Sci U.S.A. 81, 801805.
Rohde R.A. & Muller R.A. (2005). Cycles in fossil diversity. Nature 434, 208210.
Shaviv N.J. (2003). The spiral structure of the Milky Way, cosmic rays, and ice age epochs on Earth. New Astronomy 8, 3977.
Stothers R.B. (2006). The period dichotomy in terrestrial impact crater ages. Mon. Not. R. Astron. Soc. 365, 175180.
Svensmark H. (2006). Imprint of galactic dynamics on Earth's climate. Astron. Nachr. 327, 866870.
Thomas B.C. et al. (2005). Gamma-ray bursts and the Earth: exploration of atmospheric, biological, climatic and biogeochemical effects. Astrophys. J. 634, 509533.
Vallée J.P. (2005). Spiral arms and inter-arm separation. Astrophys. J. 130, 569575.
Veizer J., Goddaris Y. & Francois L.M. (2000). Evidence for decoupling of atmospheric CO2 and global climate during the Phanerozoic eon. Nature 408, 698701.
Wendler J. (2004). External forcing of the geomagnetic field? Implications for the cosmic ray flux – climate variability. J. Atmos. Solar-Terres. Phys. 66, 11951203.
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International Journal of Astrobiology
  • ISSN: 1473-5504
  • EISSN: 1475-3006
  • URL: /core/journals/international-journal-of-astrobiology
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