es lec 3 (part 1 - permian-triasic mee)
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what caused the permian-triasic mee?
long-term basaltic eruptions in siberia
how long was the permian-triasic mee?
around 1 mil yrs
how much volume of basaltic did the permian-triasic mee give off?
around 4 mil km cubed
why are basaltic eruptions dangerous?
outgassing
what 4 gases do basaltic eruptions release?
carbon dioxide, methane, sulfuric acid, sulfur dioxide
what 4 effects resulted from outgassing during the permian-triasic mee?
extreme global warming, increased acid rain, reduced ozone layer, absorption of carbon dioxide by oceans giving acidic oceans
acidic oceans and rain caused what to die during the permian-triasic mee? why was this bad?
plants + phytoplankton, collapse of marine and terrestrial ecosystems
acidic oceans did what to certain marine animals?
hurt their shells
the reason for the permian-triasic extinction wasn't well known until when?
recently
the permian-triasic mee gave survivors? during the triasic these organisms started to...?
empty niches to fill, recover
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