Student or Learner
Atmospheric Carbon Injection Linked to End-Triassic Mass Extinction
Theend-Triassic mass extinction (~201.4million yearsago),marked by terrestrial ecosystem turnover and up to ~50% loss in marine biodiversity, has been attributed to intensified volcanic activity duringthebreak-upofPangaea.Here,wepresentcompound-specificcarbon-isotopedataoflong-chain n-alkanes derived from waxes ofland plants, showing a ~8.5 per mil negative excursion, coincident with the extinction interval. These data indicate strong carbon-13 depletion of the end-Triassic
atmosphere,withinonly10,000to20,000years.Themagnit udeandrateofthiscarbon-cycle disruption 3 can be explained by the injection of at least ~12 × 10 gigatons of isotopically depleted carbon
as methane into the atmosphere. Concurrent vegetation changes reflect strong warming and an
carbonrelease and associated climate change.
What in heaven's name happened to the formatting of that??
OrshouldI ask-whatinheaven's-name happened tothefomatting??
Turnover - replacement.
When shift two comes in to work in factor and shift one goes home, that's the shift turnover.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.