extinctions major Flashcards

1
Q

-iridium anomalies
-shocked quartz
-changes in plant distribution and extinction
-increased competition with mammals

A

characteristics associated with cretaceous extinction

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2
Q

the cretaceous extinction was caused by

A

climate changes and a meteorite collision

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3
Q

extinction included
-95% of marine invertebrates
-83% of marine genera
-96% of brachiopods
-98% of crinoids and gastropods

A

the permian p-tr extinction or the “great dying”

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4
Q

what caused the permian p-tr extinction or the “great dying”?

A

siberian traps volcanism

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5
Q

extinction included
-22% of marine families
-55% of marine genera
-97% of vertebrate species
-100% of coral and stromatoporoid reefs

A

devonian mass extinction

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6
Q

-climate change and global cooling
-anoxic ocean bottom
-rapid sea level changes
-sequestration of CO2 by forests and soils
-supernova explosion

A

causes of the devonian extinction

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