extinctions major Flashcards
-iridium anomalies
-shocked quartz
-changes in plant distribution and extinction
-increased competition with mammals
characteristics associated with cretaceous extinction
the cretaceous extinction was caused by
climate changes and a meteorite collision
extinction included
-95% of marine invertebrates
-83% of marine genera
-96% of brachiopods
-98% of crinoids and gastropods
the permian p-tr extinction or the “great dying”
what caused the permian p-tr extinction or the “great dying”?
siberian traps volcanism
extinction included
-22% of marine families
-55% of marine genera
-97% of vertebrate species
-100% of coral and stromatoporoid reefs
devonian mass extinction
-climate change and global cooling
-anoxic ocean bottom
-rapid sea level changes
-sequestration of CO2 by forests and soils
-supernova explosion
causes of the devonian extinction