Alternative formation mechanisms for terrestrial crater chains

Details Alternative formation mechanisms for terrestrial crater chains Alternative formation mechanisms for terrestrial crater chains

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..837l&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 837.

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Craters, Earth Surface, Asteroids, Comets

Scientific paper

We investigate whether crater chains analogous to those seen on Ganymede and Callisto might be formed on the Earth and moon by the tidal breakup of 'rubble-pile' asteroids or comets. In our treatment, these objects are disrupted during close approaches to either the Earth or the moon, with the resulting fragment trains proceeding directly to collide with the other. This mechanism can account for 1-2 crater chains on the moon (consistent with observations), but none on the Earth, in contrast to recent suggestions. This disagreement raises the question of whether terrestrial crater chains might form by other processes. Here we briefly examine four possible alternative mechanisms for making primary crater chains on Earth. We neglect chains of secondary craters created by ejecta from larger impacts.

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