Permian Triassic boundary event

Becker L., Poreda R. J., Hunt A. G., Bunch T. E., and Rampino M. (2001) Impact event at the Permian-Triassic boundary evidence from extraterrestrial noble gases in fullerenes. Science 291, 1530-1533. 

EshetY., Rampino M.R.,Visscher H. (1995) Fungal event and palynological record of ecological crisis and recovery across the Permian-Triassic boundary. Geology 23, 967—70. 

Impact Event at the Permian-Triassic Boundary Evidence from Ebctraterrestrial Noble Gases in FuUerenes, L. Becker, R. J. Poreda, A. G. Hunt,T. E. Bunch, and M. Rampino, Science, 297(5508), 1530-1533 (2001). 

The early Mesozoic has recently received much attention with respect to the recovery of marine life from the greatest ever (end-Permian) extinction event and another major extinction event at the end of the Triassic (overviews in Erwin, 2006 Smith, 2007 and references therein). The Permian/Triassic Boundary (PTB) in particular may play a pivotal role in assessing putative cause-and-effect scenarios during the Palaeozoic-Mesozoic transition (Algeoetal., 2007). However, fish species— normally... 

About 250 million years ago, 90% of life on earth was destroyed in some sort of cataclysmic event. This event, which ended the Permian period and began the Triassic (the P-T boundary), is the most devastating mass extinction in the earth s history— far surpassing the catastrophe 65 million years ago that wiped out the dinosaurs (the K-T boundary). 

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