Jurassic Anoxic event

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the oceanic anoxic event documented jurassic took place during toarcian (~183 ma). because no dsdp (deep sea drilling project) or odp (ocean drilling program) cores have recovered black shales of age – there being little or no toarcian ocean crust remaining in world ocean – samples of black shale come outcrops on land. these outcrops, material commercial oil wells, found on major continents , event seems similar in kind 2 major cretaceous examples.








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