Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974e%26psl..23..265p&link_type=abstract
Earth and Planetary Science Letters, vol. 23, no. 3, Oct. 1974, p. 265-271; Discussion, p. 271-274. NASA-supported research.
Astronomy and Astrophysics
Astronomy
17
Astronomical Models, Lunar Craters, Lunar Maria, Surface Geometry, Apollo Flights, Lunar Landing Sites, Lunar Topography, Mass Transfer, Volcanology
Scientific paper
Amendments to a quantitative scheme developed by T. R. McGetchin et al. (1973) for predicting the distribution of ejecta from lunar basins yield substantially thicker estimates of ejecta, deposited at the basin rim-crest and at varying ranges beyond, than does the original model. Estimates of the total volume of material ejected from a basin, illustrated by Imbrium, also are much greater. Because many uncertainties affect any geometric model developed primarily from terrestrial analogs of lunar craters, predictions of ejecta thickness and volume on the moon may range within at least an order of magnitude. These problems are exemplified by the variability of T, thickness of ejecta at the rim-crest of terrestrial experimental craters. The proportion of T to crater rim-height depends critically upon scaled depth-of-burst and whether the explosive is nuclear or chemical.
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