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Recent research is now trying to tie in the massive End Permian time extinctions with a giant meteorite impact, based on the finding of shocked quartz in Australia and Antarctica.
Since geologists love cycles, five of the extinction events in Table 1 motivated David Raup and John Sepkoski to postulate a 26 million year extinction periodicity over the past 250 million years of geological time.
Within the uniformitarian paradigm, the meteorite impact theory, once considered ‘outrageous’, now is the dominant theory.
The gravity of this End Permian event varies, depending upon the scientist doing the analysis and upon whether the datum is at the species, genus, or family level.