H.: 2004, Did a Gamma-Ray Burst Initiate the Late Ordovician Mass Extinction?, Int. J. Astrobiol. 3, 55-61.Melott, A. L., B. S. Lieberman, L. D. Martin, M. V. Medvedev, B. C. Thomas, J. K. Cannizzo, N. Gehrels, and C. H. Jackman (2004), Did a gamma-ray burst ...
1.But some also believe that a gamma ray burst was responsible for the Ordovician extinction around 455 million years ago. 但是也有一些科学家认为伽玛射线爆发可能是四十五亿年前奥陶纪大灭绝罪魁祸首。 「跟马修学英语」 2.The Ordovician (440 million years ago) and Devonian (365 million) each wiped...
17.Some astrophysicists have suggested a gamma ray burst may have caused the Ordovician extinction, a global cataclysm about 450 million years ago that wiped out 80% of Earth's species, Piran notes. 18.The Ordovician event wasn't powerful enough for that material to be traced, as it would...
The triggering mechanism of the O-S mass extinction has been extensively debated, and various hypotheses have been proposed, including gamma ray burst and bolide impact12, 13; however, the cause still remains highly controversial. Intense Late Ordovician volcanism was also suggested as a potential ...
(2004) Did a gamma-ray burst initiate the late Ordovician mass extinction? Int. J. Astrobiology 3:55-61.Melott AL, Lieberman BS, Laird CM, Martin LD, Medvedev MV, Thomas BC, Cannizzo JK, Gehrels N, Jackman CH (2004) Did a gamma-ray burst initiate the late Ordovician mass extinction?