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Top of the IA Hierarchies

			............ Named Events
			................ <Named natural events>
			.................... Eruption of Krakatoa (Dutch East Indies, 1883)
			.................... Grande Coupure (animal migration, 29 million years ago)
			.................... Mexico Earthquake of 1985 (Mexican history, 1985)
			.................... Triassic-Jurassic extinction event (global, 201.3 million years ago)