The 30-Myr extinctions, SNC meteorites, and asteroids at low orbits

Details The 30-Myr extinctions, SNC meteorites, and asteroids at low orbits The 30-Myr extinctions, SNC meteorites, and asteroids at low orbits

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pazh...16..452d&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 16, May 1990, p. 452-459. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

Achondrites, Asteroids, Earth Orbits, Meteorite Collisions, Planetary Craters, Stony-Iron Meteorites, Amor Asteroid, Apollo Asteroids, Hypervelocity Impact, Meteorite Craters, Secular Variations

Scientific paper

The hypothesis of the gasdynamical ejection from the earth of asteroid-sized bodies (with a diameter up to 1 km) due to chance hyperimpacts with energy greater than 1-million Mt TNT equivalent is presented. According to the hypothesis, such impacts onto continents take place with a mean interval of 25-30 Myr. It is suggested that the terrestrial origin of certain AAA asteroids explains the duration (about 3 Myr) and the stepwise pattern of the 30-Myr extinctions. This hypothesis also clarifies the source of SNC meteorites and removes problems caused by their supposed Martian origin.

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