The Triassic-Jurassic transition (~ 201 Ma) saw one of the most catastrophic volcanic eruptions during the Phanerozoic, namely the Central Atlantic Magmatic Province (CAMP), and it has been suggested to have triggered a series of environmental/climatic perturbations which eventually caused the end-Triassic mass extinction.However, due to the lack of volcanic ash sediments outside its eruption sites, the spatial extent of the impact is not well understood.
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Source: Phys.org