The six largest extinctions were the terminal Cambrian, terminal Ordovician, Late Devonian, terminal Permian, terminal Triassic, and terminal Cretaceous. Since a greater number of genera went extinct in any one of these events that have during the entire Holocene. Palmer, A.R. (1965), Biomere: A New Kind of Biostratigraphic Unit , Journal of Paleontology, vol. 39, pp. 149.
Raup, D. & Sepkoski, J. (1982). "Mass extinctions in the marine fossil record". Science 215: 1501–1503
Calling the Holocene exitinct event the "Sixth Extinction" is utter crap. The twenty extinction events in the Ordovician to Devonian, the four trilobite biomere extinctions in the Cambrian, terminal Miocene, Ecocene, and Pleistocence extinctions were all of greater magnitude than our current extinction, both in the total number of genera that went extinct and the percentage of know genera that went extinct.
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The six largest extinctions were the terminal Cambrian, terminal Ordovician, Late Devonian, terminal Permian, terminal Triassic, and terminal Cretaceous. Since a greater number of genera went extinct in any one of these events that have during the entire Holocene. Palmer, A.R. (1965), Biomere: A New Kind of Biostratigraphic Unit , Journal of Paleontology, vol. 39, pp. 149.
Raup, D. & Sepkoski, J. (1982). "Mass extinctions in the marine fossil record". Science 215: 1501–1503
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Calling the Holocene exitinct event the "Sixth Extinction" is utter crap. The twenty extinction events in the Ordovician to Devonian, the four trilobite biomere extinctions in the Cambrian, terminal Miocene, Ecocene, and Pleistocence extinctions were all of greater magnitude than our current extinction, both in the total number of genera that went extinct and the percentage of know genera that went extinct.
12345combination 1 year ago