Physics
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.2947i&link_type=abstract
In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 3. (A77-34651 15-91) New York, Pergamon
Physics
5
Cratering, Gravitational Effects, Lunar Craters, Meteorite Craters, Hypervelocity Impact, Lunar Gravitation, Lunar Surface, Particle Trajectories, Ring Structures
Scientific paper
The solution of many problems in lunar and terrestrial planetary structure is closely associated with progress in studies of the mechanics of meteorite impact cratering. This paper analyzes some possible qualitative variations of crater structure due to the gravitational field or magnitude of the impact. On the basis of model experiments and theoretical calculations, the initial velocity of ejecta is estimated and it is shown that with increasing crater size, there is some critical value above which a part of the ejected material will fall back into the crater. This process decreases the crater dimensions and in the larger structures can form multiple rings. The atmospheric effect on ejecta motion is briefly considered.
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