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Mass Extinctions, Comet Impacts, and The Galaxy

Published online by Cambridge University Press:  14 August 2015

Michael R. Rampino  and
Richard B. Stothers
Michael R. Rampino
Affiliation:
NASA, Goddard Institute for Space Studies, New York, New York, 10025 USA and Earth & Environmental Science Program, New York University, New York, New York, 10003 USA
Richard B. Stothers
Affiliation:
NASA, Goddard Institute for Space Studies, New York, New York, 10025 USA

Abstract

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The hypothesis relating mass extinctions of life on Earth to impacts of comets whose flux is partly modulated by the dynamics of the Milky Way Galaxy contains a number of postulates that can be tested by geologic evidence and statistical analyses. In an increasing number of cases, geologic evidence for impact (widespread impact debris and/or large impact craters) is found at times of mass extinction events, and the record of dated impact craters has been found to show a significant correlation with mass extinctions. Statistical analyses suggest that mass extinction events exhibit a periodic component of about 26 to 30 Myr, and periodicities of 30± 0.5 Myr and 35 ±2 Myr have been extracted from sets of well-dated impact craters. The evidence is consistent with periodic or quasi-periodic showers of impactors, probably Oort Cloud comets, with an approximately 30-Myr cycle. The best explanation for these proposed quasi-periodic comet showers involves the Sun’s vertical oscillation through the galactic disk, which may have a similar cycle time between crossings of the galactic plane.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 1: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part A), 1997 , 1998 , pp. 246 - 251
Copyright
Copyright © Kluwer 1998

References

Alvarez, W. 1986. Toward a Theory of Impact Crises. Ens, Transactions of the American Geophysical Union 67. C49–658.Google Scholar
Alvarez, W. and Muller, R.A. 1984. Evidence From Crater Ages for Periodic Impacts on the Earth. Nature 308, 718–720.Google Scholar
Fogg, M.J. 1989. The Relevance of the Background Impact Flux to Cyclic Impact/Mass Extinction Hypotheses. Icarus 79, 382–395.Google Scholar
Gould, A., Bahcall, J.N. and Flynn, C. 1996. Disk M Dwarf Luminosity Function from Hubble Space Telescope Star Counts. Astrophys, J. 465, 759–768.Google Scholar
Grieve, R.A.F. 1996. Chesapeake Bay and Other Terminal Eocene Impacts. Meteoritics and Planetary Science 31 166–167.Google Scholar
Grieve, R.A.F. 1997. Extraterrestrial Impact Events: The Record in the Rocks and the Stratigraphie Column. Palaeoclimatology, Palaeogeography, Palaeoecology 132, 5–23.Google Scholar
Grieve, R.A.F. and Pesonen, L.J. 1996. Terrestrial Impact Craters: Their Spatial and Temporal Distribution and Impacting Bodies. Earth, Moon and Planets 72, 357–376.Google Scholar
Grieve, R.A.F. and Shoemaker, E.M. 1994. The Record of Past Impacts on Earth. Hazards Due to Comets & Asteroids (Gehrels, T., Ed.), 417–462. Univ. of Arizona Press, Tucson.Google Scholar
Heisler, J. and Tremarne, S. 1989. How Dating Uncertainties Affect the Detection of Periodicity in Extinctions and Craters. Icarus 77, 213–219.Google Scholar
Hildebrand, A.R., Pilkington, M., Connors, M., Ortiz-Aleman, C. and Chavez, R.E. 1995. Size and Structure of the Chicxulub Crater Revealed by Horizontal Gravity Gradients and Cenotes. Nature 376, 415–417.Google Scholar
Hut, P., Alvarez, W., Elder, W.P., Hansen, T., Kauffman, E.G., Keller, G., Shoemaker, E.M. and Weissman, P.R. 1987. Comet Showers as a Cause of Mass Extinctions. Nature 329, 118–126.Google Scholar
Lequeux, J., Allen, R.J. and Guilloteau, S. 1993. CO Absorption in the Outer Galaxy, Abundant Cold Molecular Gas. Astronomy and Astrophysics 280, L23–L26.Google Scholar
Matese, J.J., Whitman, P.G., Innanen, K.A. and Valtonen, M.J. 1995. Periodic Modulation of the Oort Cloud Comet Flux by the Adiabatically Changing Galactic Tide. Icarus 116, 255–268.Google Scholar
Matsumoto, M. and Kubotani, H. 1996. A Statistical Test for Correlation Between Crater Formation Rate and Mass Extinctions. MNRAS 282, 1407–1412.Google Scholar
Melosh, H.J., Schneider, N.M., Zahnle, K.J. and Latham, D. 1990. Ignition of Global Wildfires at the Cretaceous/Tertiary Boundary. Nature 343, 251–254.Google Scholar
Pope, K.O., Baines, K.H., Ocampo, A.C. and Ivanov, B.A. 1994. Impact Winter and the Cretaceous/Tertiary Extinctions: Results of a Chicxulub Asteroid Impact Model. Earth and Planetary Science Letters 128, 719–725.Google Scholar
Rampino, M.R. and Haggerty, B.M. 1996. The “Shiva Hypothesis”: Impacts, Mass Extinctions, and the Galaxy. Earth, Moon and Planets 72, 441–460.Google Scholar
Rampino, M.R., Haggerty, B.M. and T.C., Pagano 1997. A Unified Theory of Impact Crises and Mass Extinctions: Quantitative Tests. Annals of the New York Academy of Sciences 822, 403–431.Google Scholar
Rampino, M.R. and Stothers, R.B. 1984a. Terrestrial Mass Extinctions, Cometary Impacts and the Sun’s Motion Perpendicular to the Galactic Plane. Nature 308, 709–712.Google Scholar
Rampino, M.R. and Stothers, R.B. 1984b. Geological Rhythms and Cometary Impacts. Science 226, 1427–1431.Google Scholar
Rampino, M.R. and Stothers, R.B. 1986. Geologic Periodicities and the Galaxy. The Galaxy and the Solar System (Smoluchowski, R., Bahcall, J.N. and Matthews, M.S., Eds.), 241–259. Univ. of Arizona Press, Tucson.Google Scholar
Rampino, M.R. and Stothers, R.B. 1988. Flood Basalt Volcanism During the Past 250 Million Years. Science 241, 663–668.Google Scholar
Raup, D.M. 1992. Large-Body Impact and Extinction in the Phanerozoic. Paleobiology 18, 80–88.Google Scholar
Raup, D.M. and Sepkoski, J.J. Jr. 1984. Periodicity of Extinctions in the Geologic Past. Proceedings of the National Academy of Sciences USA 81, 801–805.Google Scholar
Raup, D.M. and Sepkoski, J.J. Jr. 1986. Periodic Extinctions of Families and Genera. Science 231, 833–836.Google Scholar
Retallack, G.J., Seyedolali, A., Holser, W.T., Krinsley, D. and Krull, E.S. 1996. Shocked Quartz at the Permian-Triassic Boundary, in Australia and Antarctica. Geological Society of America Abstracts with Programs 28, A–368.Google Scholar
Scalo, J.M. and Smoluchowski, R. 1984. Galactic Gravitational Shock and the Extinction of Species. Bulletin of the American Astronomical Society 16, 493–494.Google Scholar
Sepkoski, J.J. Jr. 1995. Patterns of Phanerozoic Extinction: A perspective From Global Data Bases. Global Events and Event Stratigraphy in the Phanerozoic (Walliser, O.H., Ed.), 35–51. Springer, Berlin.Google Scholar
Shoemaker, E.M. and Wolfe, R.F. 1986. Mass Extinctions, Crater Ages, and Comet Showers. The Galaxy and the Solar System (Smoluchowski, R., Bahcall, J.N. and Matthews, M.S., Eds.), 338–386. Univ. of Arizona Press, Tucson.Google Scholar
Shoemaker, E.M., Wolfe, R.F. and Shoemaker, C.S. 1990. Asteroid and Comet Flux in the Neighborhood of Earth. Geological Society of America Special Paper 247, 155–170.Google Scholar
Stothers, R.B. 1984. Mass Extinctions and Missing Matter. Nature 311, 17.Google Scholar
Stothers, R.B. 1985. Terrestrial Record of the Solar System’s Oscillation About the Galactic Plane. Nature 317, 338–341.Google Scholar
Stothers, R.B. 1988. Structure of Oort’s Comet Cloud Inferred From Terrestrial Impact Craters. Observatory 108, 1–9.Google Scholar
Stothers, R.B. 1989. Structure and Dating Errors in the Geologic Time Scale and Periodicity in Mass Extinctions. Geophysical Research Letters 16, 119–122.Google Scholar
Stothers, R.B. 1993. Impact Cratering at Geologic Stage Boundaries. Geophysical Research Letters 20, 887–890.Google Scholar
Toon, O.B., Zahnle, K., Turco, R.P. and Covey, C. 1994. Environmental Perturbations Caused by Asteroid Impacts. Hazards due to Asteroids and Comets (Gehrels, T., Ed.), 791–826. Univ. of Arizona Press, Tucson.Google Scholar
Trefil, J.S. and Raup, D.M. 1987. Numerical Simulations and the Problem of Periodicity in the Cratering Record. Earth and Planetary Science Letters 82, 159–164.Google Scholar
Yabushita, S. 1991. A Statistical Test for Periodicity Hypothesis in the Crater Formation Rate. MNRAS250, 481–485.Google Scholar
Yabushita, S. 1992. Periodicity in the Crater Formation Rate and Implications for Astronomical Modeling. Dynamics and Evolution of Minor Bodies with Galactic and Geological Implications (Clube, S.V.M., Yabushita, S. and Henrard, J., Eds.), 161–178. Kluwer, Dordrecht.Google Scholar
Yabushita, S. 1996a. Are Cratering and Probably Related Geological Records Periodic? Earth, Moon, and Planets 72, 343–356.Google Scholar
Yabushita, S. 1996b. Statistical Tests of a Periodicity Hypothesis For Crater Formation Rate-II. MNRAS 279, 727–732.Google Scholar