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Mass Extinctions
Study cards about the five major mass extinctions in Phanerozoic geologic histor
| Definition | Term |
|---|---|
| Mass extinction with the most convincing evidence that it was caused by the aftermath of a large meteorite. Notable victims of dinosaurs and marine reptiles. | end-Cretaceous |
| Mass extinction that occurred at the same time as ocean anoxia. Notable victims of placoderm fish and rugose corals. | late Devonian |
| Mass extinction that occurred at the same time as large-scale carbon dioxide increase -- either from volcanoes or methane. Notable victims of phytosaurs and many ammonite families. | end-Triassic |
| Mass extinction that occurred in a time of widespread continental glaciation. Notable victims of many crinoid families and many trilobite families. | end-Ordovician |
| Mass extinction that coincided with the flood volcanism called the Siberian traps. Notable victims of early land amphibians and reptiles and 90% of coral reef species. | end-Permian |