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• 15:56, 1 January 2010 Swilliams talk contribs deleted page Cambrian-Ordovician extinction events (content was: '{{expand|date=January 2007}} The '''Cambrian-Ordovician extinction event''' occurred approximately 488 million years ago. It was the first major extinction event in the Phanerozoic era and it eliminated many brachiopods, conod...')