The galactic cycle of extinction

  title={The galactic cycle of extinction},
  author={Michel Gillman and Hilary E. Erenler},
  journal={International Journal of Astrobiology},
  pages={17 - 26}
Abstract 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… 
Mapping the location of terrestrial impacts and extinctions onto the spiral arm structure of the Milky Way
Abstract High-density regions within the spiral arms are expected to have profound effects on passing stars. Understanding of the potential effects on the Earth and our Solar System is dependent on a
A New View of the Mass Extinctions and the Worldwide Floods
  • A. Safronov
  • Geology, Geography
    International Journal of Geosciences
  • 2020
In this study, the reasons for mass extinction in Jurassic were investigated. It was shown that galactic compression led to the activation of terrestrial nuclear reactors, which in turn led to the
Interaction of the reasons for the mass biota extinctions in the Phanerozoic
The consideration of the conditions during the mass extinctions has shown that a series of factors, including mutually independent tectonic movements, variations in the sea level and climate,
Periodic Signals of the Milky Way Concealed in Terrestrial Sedimentary Basin Fills and in Planetary Magmatism
Long periodic geodynamic processes with durations between 150 and 600 Million years appear to be in phase with similar galactic cycles, caused by the path of the solar system through the spiral arms
Cosmophysical situation in the epoch of the Cambrian explosion
Based on available published paleodata, cosmophysical environment of the Earth during the Cambrian evolutionary explosion is considered. Some astrophysical data demonstrate that, about 500 Ma, the
The evidence for and against astronomical impacts on climate change and mass extinctions: a review
It is concluded that there is little evidence for intrinsic periodicities in biodiversity, impact cratering or climate on timescales of tens to hundreds of Myr, and the numerous assumptions and uncertainties involved in the interpretation of the geological data suggest that Galactic midplane and spiral arm crossings have little impact on biological or climate variation above background level.
Changes in the Geomagnetic Field and the Evolution of Marine Biota
Ideas about the geomagnetic field’s influence on evolution and biodiversity are controversial. The quantitative distribution of datum levels of oceanic microplankton during the last 2.0 Ma shows a
Causes and prime causes of mass biotic extinctions in the phanerozoic
  • M. S. Barash
  • Geography, Environmental Science
    Doklady Earth Sciences
  • 2012
925 Changes of various scales in biotic communities determined by environmental reorganizations provide grounds for defining geological periods. Transitions between geological periods are marked by
S1473550418000125jra 323..328
High-density regions within the spiral arms are expected to have profound effects on passing stars. Understanding of the potential effects on the Earth and our Solar System is dependent on a robust


Global repeating events in the history of the Earth and the motion of the Sun in the Galaxy
Chronological analyses of correlations between certain global repeating events (mass extinctions of marine organisms, meteorite impacts, and flashes in the frequency of geomagnetic reversals) during
Mass extinctions and the sun's encounters with spiral arms
Terrestrial mass extinctions, cometary impacts and the Sun's motion perpendicular to the galactic plane
Episodes of mass extinctions on the Earth are now strongly suspected to be cyclical1. We report here that our analysis of the data of Raup and Sepkoski1 suggests that the dominant cyclicity in major
Imprint of Galactic dynamics on Earth's climate
A connection between climate and the Solar system's motion perpendicular to the Galactic plane during the last 200 Myr years is studied. An imprint of galactic dynamics is found in a long-term record
Periodicity of extinctions in the geologic past.
  • D. Raup, J. Sepkoski
  • Geography, Environmental Science
    Proceedings of the National Academy of Sciences of the United States of America
  • 1984
The temporal distribution of the major extinctions over the past 250 million years has been investigated statistically using various forms of time series analysis and contains 12 extinction events that show a statistically significant periodicity.
We present a calculation of the Sun's motion through the Milky Way over the last 500 million yr. The integration is based on estimates of the Sun's current position and speed from measurements with
It is shown that CR flux can vary by a factor of about 4.6 and reach a maximum at northernmost displacement of the Sun and the phase agreement between solar northward excursions and the diversity minima provides solid support for the model.