Cambrian-Ordovician extinction event

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Cambrian-Ordovician extinction event

The Cambrian-Ordovician extinction event was a mass extinction event which marked the transition from the Cambrian to Ordovician. It was caused by a change in sea level, flooding portions of the two super-continents of the Cambrian era, Laurentia and Baltica and Gondwana. (PROSE: Prehistory Repeating Itself [+]Loading...["Prehistory Repeating Itself (feature)"])