Abstract
Multivariate analyses were performed on certain linear dimensions of six genetic types of craters. A total of 320 craters, consisting of laboratory fluidization craters, craters formed by chemical and nuclear explosives, terrestrial maars and other volcanic craters, and terrestrial meteorite impact craters, authenticated and probable, were analyzed in the first data set in terms of their mean rim crest diameter (Dr), mean interior relief (Ri), rim height (Re), and mean exterior rim width (We). The second data set contained an additional 91 terrestrial craters of which 19 were of experimental percussive impact and 28 of volcanic collapse origin, and which was analyzed in terms ofDr,Ri, andRe. Principal component analyses were performed on the six genetic types of craters; 90% of the variation in the variables can be accounted for by two components. 99% of the variation in the craters formed by chemical and nuclear explosives is explained by the first component alone.
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