Background Anoxic event

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oceanic anoxic events euxinic (i.e. sulfidic) conditions have been linked extreme episodes of volcanic outgassing. thus, volcanism contributed buildup of co2 in atmosphere, increased global temperatures, causing accelerated hydrological cycle introduced nutrients oceans stimulate planktonic productivity. these processes potentially acted trigger euxinia in restricted basins water-column stratification develop. under anoxic euxinic conditions, oceanic phosphate not retained in sediment , hence released , recycled, aiding continued high productivity.








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