Evidence for comet storms in meteorite ages

Details Evidence for comet storms in meteorite ages Evidence for comet storms in meteorite ages

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...74..369p&link_type=abstract

Icarus (ISSN 0019-1035), vol. 74, May 1988, p. 369-373.

Computer Science

5

Chondrites, Comets, Cosmic Rays, Meteoritic Composition, Meteoroid Showers, Neon Isotopes, Perturbation Theory, Solar System, Meteorites, Cosmic Rays, Exposure Age, H Chondrites, Stony Meteorites, Formation, Parent Bodies, Comets, Asteroids, Impacts, Craters, Glasses, Magnetic Properties, Theoretical Studies, Hypotheses, Geomagnetism

Scientific paper

The clustering of cosmic-ray exposure ages of H-chondrite meteorites, previously interpreted as an indication of creation in two relatively brief events, is the subject of the present calibration efforts. The two events are placed at 7 + or - 3 and 30 + or - 6 million years ago; a third event is suggested to have occurred at approximately 62 + or - 8 million years. Attention is given to independent evidence that comet showers occurred at those times, as in the cases of the fossil record of family and genus extinctions, impact craters, and geomagnetic reversals.

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