es lec 3 (part 1 - permian-triasic mee)

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